The cone design discussion thread

i still think its marketing...
the mere fact on how skimming works has nothing to do with shape of the chamber, but rather its height and diameter vs its conical'ness
but i am willing to setup 2 similar systems and test the theory in my lab
 
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dallasg said:
look at mudsharks tank.....
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I dont think mudsharks tank can be used as an example. Firstly he is very diligent with water changes and he ran into a nitrate problem thats when he added a monster skimmer
 
@ dallas i am on my phone so cannot quote but u staated skimmers and waterchanges are a gimmick.

mudshark did 15% weekly waterchanges on his system when the tank was skimmerless now its got a mother of a skimmer on
 
ziyaadb said:
@ dallas i am on my phone so cannot quote but u staated skimmers and waterchanges are a gimmick.

mudshark did 15% weekly waterchanges on his system when the tank was skimmerless now its got a mother of a skimmer on
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u misread, i said the cone design was a gimmick, and water changes are too, but thats my view so that salt producers can sell salt

list me 5 of your reasons u change water?
 
only reason i do waterchanges is because i believe its beneficial to the system as i am putting fresh water into a system thats completely closed. its a personal preference as i know its possible to run an established system without water changes. but i would love to see a system that has gone for at least 3 years without a single waterchange.

why is it that when a system has an issue/s the 1st thing tht a reefer does is a wc?
 
How can a closed system behave like an open one, it can't elements have to be replenished or discarded by water changes . Only if you are stocking next to nothing can you get away with almost no water changes

1. i do WC to reduce dissolved organics
2. i do WC to replenish trace elements
3. i do WC to reduce nitrate and phosphates
4. i do WC to reduce harmful byproducts produced by algae and corals (alleopathy)
5. i do WC to reduce detritus levels( create storm in tank) then replace water

I know you werent necessarily asking me but i am firm believer in Water changes unless one happens to have a tap of the ocean that one can use every hour to make a semi-open system. Even a "kidney" type filter or the most sophisticated filters on the market wouldnt be as good as fresh good quality Sea water. A tank without water changes will end up like a rock pool and those often have few corals and tons of algae even though they are very established biologically
 
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Have any one of you have knowlege, used or heard of DAF/SCAF units. This is a "industrial skimmer" for sewage plants. It uses the same principals as skimmers but is a rectangular shape. In other words no cone effect. Air bubbles are used to surface the impurities and are scraped off at he top. The flow is relatively slow through this peace of equipment.

The bigger the bubble the less bubble surface there is to take out your impurities. The retention time in the unit is in minutes. The slower the flow, the more "crap" comes out and the cleaner the discharge water. This is my daytime job for years now.

So, the cone shape should not be crutial in the design of a skimmer. I would say out of industial experience, the retention time (Flow rate throught skimmer) and the amount of air is crutial.
 
freek said:
Have any one of you have knowlege, used or heard of DAF/SCAF units. This is a "industrial skimmer" for sewage plants. It uses the same principals as skimmers but is a rectangular shape. In other words no cone effect. Air bubbles are used to surface the impurities and are scraped off at he top. The flow is relatively slow through this peace of equipment.

The bigger the bubble the less bubble surface there is to take out your impurities. The retention time in the unit is in minutes. The slower the flow, the more "crap" comes out and the cleaner the discharge water. This is my daytime job for years now.

So, the cone shape should not be crutial in the design of a skimmer. I would say out of industial experience, the retention time (Flow rate throught skimmer) and the amount of air is crutial.
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Yeah you pritty much mentioned what we all know already, the debate is not does a conv skimmer work vs does a cone skimmer work. But the debate is around the idea that a cone skimmer performs better than a conventional skimmer and if so why.

Its strange how industrial equipment are often used to create so called new tech equipment in the hobby industry when infact the tech has been around for donkeys years
 
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