I made the choice to use a provoking title for this thread to get your attention, as I think the more people know about it, the better for all. I strongly believe that a lot of livestock dies a long and silent death because of our lack in knowledge about electrolysis.
You guys are really making me sick?
That is what our inhabitants probably would say. Now that I have your attention, please keep on reading.
What is electrolysis?
I will keep the term electrolysis only related to brine (which is salt water) as that is what we need to know.
Well, I'm not a scientist nor chemist. I will put it in plain”english”, which is way easier to understand.
Imagine you take a jar of tank water (brine/salt water) or you take tap water and add some salt to it. Now you take any battery and connect two wires to the battery. At the end of both wires you connect a probe (stainless steel for example). Put both probes into the water.
That means the + (plus) from your battery is connected to one probe and inside the water. The – (minus) from your battery is also connected to your battery and also inside the water.
The water itself closes the circuit and the current flows from + probe to the - probe.
You should try it for yourself. I did and will share the results later in this thread.
The + probe can be also a leaking pump, heater, etc. and the – probe can be another pump, heater, etc. Or to eliminate stray voltage in your tank, you choose a grounding probe.
Which many of us did after the thread about stray voltage or many are going to do after the thread about Herkie's death.
Electrolysis due to stray voltage
Having stray voltage in your tank and having a grounding probe connected to the earth leakage will result in electrolysis.
Having a leaking appliance (pump, heater, etc.) submerged with a leak at + (L or load) and having another leaking appliance submerged with a leak at - (N or neutral) will result in electrolysis.
In both cases you will have a closed circuit between L and N or L and the earth leakage (grounding probe).
Having stray voltage in your tank can happen very easily at any given time. Many new pumps, heaters, etc. can create stray voltage from day one when submerged.
I have two heaters, both create 7 Volt and my return pump creates 6 V. Total of 20 Volt.
How to avoid stray voltage?
Having stray voltage is not good at all and should be avoided. Return pumps should be external, skimmer pumps as well. Heater? No other option than submerged. Flow pumps?
Unfortunately have to be submerged as well unless you run a closed loop with an external pump.
What happens to tank inhabitants when stray voltage is present?
Well, depending on how high the voltage is. Stray voltage can be measured in your tank water, even if there is actually none. Meaning that electro magnetic fields can give you a reading on your Voltmeter, but there is actually no leakage from any appliances.
A summary of various symptoms in found in articles on the internet:
Fish:
Voltage and current? What is the difference?
Voltage being present in the water means, that your inhabitants are like the sitting birds on high voltage line. Voltage is present but doesn't take serious influence on the inhabitants.
I say serious as it is not proven if just the present voltage can harm our inhabitants.
Current means, that the present voltage can now flow through the water. Inhabitants are getting zapped. More or less, depending at the strength of the current.
Touching a battery on both sides will create a current through your body, but you might not feel it. Touching a live wire and you will feel it.
Advice of grounding a system or not?
The advise given on the internet was always to ground the system. Every stray voltage article I read mainly ended with the same advise. A few reefers just referred to the birds sitting on the high voltage line without getting shocked as they are not grounded. Other just didn't allow any stray voltage in their system, despite what the majority had to say. A few mentioned if the circuit is closed, electrolysis will take place. None of them really explained what that really means and what stuff really gets produced in our systems due to electrolysis.
My advise?
For your own safety and to keep track on faulty appliances, I highly recommend to connect a Voltmeter to your tank. The red probe has to be connected to a saltwater resistant stainless steel probe or titanium probe and submerged into your system. The black probe has to be connected to the earth leakage, which can be connected via a wire to the biggest (earth) prong of a 3 prong plug. Plugged into a socket which is connected to the earth leakage of your main board will do the job.
At any given time you can just switch on the voltmeter and take the reading. Advisable every day!
For more safety, I recommend to put a ground probe into your tank, which has to be disconnected via a normal switch to avoid closing the circuit and to avoid current in your tank.
Switching it on, (allowing the ground probe to be connected to the earth leakage) will give you 100% safety when working with your hands in the water. Once your hands are out of the water again, switch off to avoid closing the circuit.
My fish changed their behaviour and eating habits to normal, shortly after I took the ground probe out of my system. I still have 20 Volt in there, but no current (closed circuit).
Everything is back to normal, besides a few fish might not recover from their damaged gills.
The fatal mistake I made was to ground my system. Sleepless nights, not knowing what the cause could be, are finally over.
What happened in my system?
When my other return pump was leaking over 200 Volt into my system, I didn't even realize that as my system was grounded. I checked once in a while the Voltage in the system.
Before this happened, many of my fish turned blind, didn't swim normal, were breathing heavily and not really eating. Every day I lost fish. I found out that the pump needs to be replaced, which I did, but the fish still kept on being sick. I nearly dropped my future plans for breeding and almost shut my system off. I am down to only 16 fish, including a single albino clown. A few fish might not make it as the damage has been done already.
What was I looking for?
Bacterial diseases, parasites, chlorine, ammonia, chloramine. Even Iron.
After lots of test I was sure to exclude diseases or parasites from the cause. I was sure that chloramine was present. Unfortunately it was not. I was sick and tired of guessing what could wipe out almost everything. If I want to make breeding fish for a living, I have to know the cause to avoid it in the future.
How did I find out what was the cause?
The award goes to David Vaughan from the Two Oceans Aquarium, who pointed it out. I told him about all symptoms and first thing he said was “Oxidation”. Everything points out to oxidation, which will damage tissue from inhabitants. Firstly eyes and gills are effected. Fish turn blind, breathing heavy, fish can not close his mouth, etc. All muscles are tense, blood flow is restricted. Not eating, etc.
I told him about the broken pump and the current of more than 200 Volt over an unknown period of time. He said, you did produce bleach due to electrolysis in your system.
The damage has been done, he said, and time will tell what will survive and what not.
Know I want to know it. I googled it myself, without @belindamotion 's help. I read such a lot of articles about electrolysis, about electrolyzed water, ground probes, stray voltage, voltage and current. But I never could find anything related to our hobby, where the impact of electrolysis in our systems is explained.
What are the products of electrolysis?
Well, some nasty shit gets produced.
Sodiumhypochlorite, which is a better word for bleach.
Hydrochloric acid
It releases heavy metals from the probes into the water. See the picture of the probes I used further below.
And whatever else I could not find. Which does not really matter, when you read the following part.
Doing my own electrolysis
I wanted to know what it really is. So I took 750 ml of my tank water and put it into a jar.
I connected a laptop charger with 19 Volt DC output to two stainless steel probes.
Only the positive probe I submerged to get the voltage of 19 Volt DC into the water.
Strangely, when I measured the present DC voltage via my Voltmeter standing on AC, the reading was 110 Volt when I grounded the water to the earth leakage. Maybe some electrician can shed some light into the above.
So after 10 minutes having 19 Volt DC or 110 Volt AC in the jar, I the checked PH. Everything was normal like before adding the voltage.
Now I created 19V current with adding the negative probe into the water.
Shocking. Within seconds the water turned brownish/yellow.
You guys are really making me sick?
That is what our inhabitants probably would say. Now that I have your attention, please keep on reading.
What is electrolysis?
I will keep the term electrolysis only related to brine (which is salt water) as that is what we need to know.
Well, I'm not a scientist nor chemist. I will put it in plain”english”, which is way easier to understand.
Imagine you take a jar of tank water (brine/salt water) or you take tap water and add some salt to it. Now you take any battery and connect two wires to the battery. At the end of both wires you connect a probe (stainless steel for example). Put both probes into the water.
That means the + (plus) from your battery is connected to one probe and inside the water. The – (minus) from your battery is also connected to your battery and also inside the water.
The water itself closes the circuit and the current flows from + probe to the - probe.
You should try it for yourself. I did and will share the results later in this thread.
The + probe can be also a leaking pump, heater, etc. and the – probe can be another pump, heater, etc. Or to eliminate stray voltage in your tank, you choose a grounding probe.
Which many of us did after the thread about stray voltage or many are going to do after the thread about Herkie's death.
Electrolysis due to stray voltage
Having stray voltage in your tank and having a grounding probe connected to the earth leakage will result in electrolysis.
Having a leaking appliance (pump, heater, etc.) submerged with a leak at + (L or load) and having another leaking appliance submerged with a leak at - (N or neutral) will result in electrolysis.
In both cases you will have a closed circuit between L and N or L and the earth leakage (grounding probe).
Having stray voltage in your tank can happen very easily at any given time. Many new pumps, heaters, etc. can create stray voltage from day one when submerged.
I have two heaters, both create 7 Volt and my return pump creates 6 V. Total of 20 Volt.
How to avoid stray voltage?
Having stray voltage is not good at all and should be avoided. Return pumps should be external, skimmer pumps as well. Heater? No other option than submerged. Flow pumps?
Unfortunately have to be submerged as well unless you run a closed loop with an external pump.
What happens to tank inhabitants when stray voltage is present?
Well, depending on how high the voltage is. Stray voltage can be measured in your tank water, even if there is actually none. Meaning that electro magnetic fields can give you a reading on your Voltmeter, but there is actually no leakage from any appliances.
A summary of various symptoms in found in articles on the internet:
Fish:
- Continual scratching
- Lateral line corrosion
- Strange fungal infections along the lateral line or on the mouth/forehead
- Hole in the head disease
- seeking shelter where the current is not so strong
- swimming strangely
- constantly open mouth
- Extensive loss of zooxanthellae in SPS and LPS coral
- Tissue recession and polyp bail-out in SPS coral
- Shrivelled up and discoloured soft coral
- Complete "melt down" of soft coral
- Leather coral shed excessively and will not extend their polyps
- Retraction of the mantle, sometimes in only one place
- Central bleaching of the mantle
- Excessive moulting
Voltage and current? What is the difference?
Voltage being present in the water means, that your inhabitants are like the sitting birds on high voltage line. Voltage is present but doesn't take serious influence on the inhabitants.
I say serious as it is not proven if just the present voltage can harm our inhabitants.
Current means, that the present voltage can now flow through the water. Inhabitants are getting zapped. More or less, depending at the strength of the current.
Touching a battery on both sides will create a current through your body, but you might not feel it. Touching a live wire and you will feel it.
Advice of grounding a system or not?
The advise given on the internet was always to ground the system. Every stray voltage article I read mainly ended with the same advise. A few reefers just referred to the birds sitting on the high voltage line without getting shocked as they are not grounded. Other just didn't allow any stray voltage in their system, despite what the majority had to say. A few mentioned if the circuit is closed, electrolysis will take place. None of them really explained what that really means and what stuff really gets produced in our systems due to electrolysis.
My advise?
For your own safety and to keep track on faulty appliances, I highly recommend to connect a Voltmeter to your tank. The red probe has to be connected to a saltwater resistant stainless steel probe or titanium probe and submerged into your system. The black probe has to be connected to the earth leakage, which can be connected via a wire to the biggest (earth) prong of a 3 prong plug. Plugged into a socket which is connected to the earth leakage of your main board will do the job.
At any given time you can just switch on the voltmeter and take the reading. Advisable every day!
For more safety, I recommend to put a ground probe into your tank, which has to be disconnected via a normal switch to avoid closing the circuit and to avoid current in your tank.
Switching it on, (allowing the ground probe to be connected to the earth leakage) will give you 100% safety when working with your hands in the water. Once your hands are out of the water again, switch off to avoid closing the circuit.
My fish changed their behaviour and eating habits to normal, shortly after I took the ground probe out of my system. I still have 20 Volt in there, but no current (closed circuit).
Everything is back to normal, besides a few fish might not recover from their damaged gills.
The fatal mistake I made was to ground my system. Sleepless nights, not knowing what the cause could be, are finally over.
What happened in my system?
When my other return pump was leaking over 200 Volt into my system, I didn't even realize that as my system was grounded. I checked once in a while the Voltage in the system.
Before this happened, many of my fish turned blind, didn't swim normal, were breathing heavily and not really eating. Every day I lost fish. I found out that the pump needs to be replaced, which I did, but the fish still kept on being sick. I nearly dropped my future plans for breeding and almost shut my system off. I am down to only 16 fish, including a single albino clown. A few fish might not make it as the damage has been done already.
What was I looking for?
Bacterial diseases, parasites, chlorine, ammonia, chloramine. Even Iron.
After lots of test I was sure to exclude diseases or parasites from the cause. I was sure that chloramine was present. Unfortunately it was not. I was sick and tired of guessing what could wipe out almost everything. If I want to make breeding fish for a living, I have to know the cause to avoid it in the future.
How did I find out what was the cause?
The award goes to David Vaughan from the Two Oceans Aquarium, who pointed it out. I told him about all symptoms and first thing he said was “Oxidation”. Everything points out to oxidation, which will damage tissue from inhabitants. Firstly eyes and gills are effected. Fish turn blind, breathing heavy, fish can not close his mouth, etc. All muscles are tense, blood flow is restricted. Not eating, etc.
I told him about the broken pump and the current of more than 200 Volt over an unknown period of time. He said, you did produce bleach due to electrolysis in your system.
The damage has been done, he said, and time will tell what will survive and what not.
Know I want to know it. I googled it myself, without @belindamotion 's help. I read such a lot of articles about electrolysis, about electrolyzed water, ground probes, stray voltage, voltage and current. But I never could find anything related to our hobby, where the impact of electrolysis in our systems is explained.
What are the products of electrolysis?
Well, some nasty shit gets produced.
Sodiumhypochlorite, which is a better word for bleach.
Hydrochloric acid
It releases heavy metals from the probes into the water. See the picture of the probes I used further below.
And whatever else I could not find. Which does not really matter, when you read the following part.
Doing my own electrolysis
I wanted to know what it really is. So I took 750 ml of my tank water and put it into a jar.
I connected a laptop charger with 19 Volt DC output to two stainless steel probes.
Only the positive probe I submerged to get the voltage of 19 Volt DC into the water.
Strangely, when I measured the present DC voltage via my Voltmeter standing on AC, the reading was 110 Volt when I grounded the water to the earth leakage. Maybe some electrician can shed some light into the above.
So after 10 minutes having 19 Volt DC or 110 Volt AC in the jar, I the checked PH. Everything was normal like before adding the voltage.
Now I created 19V current with adding the negative probe into the water.
Shocking. Within seconds the water turned brownish/yellow.
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