High PH in RO water

Calcium Chloride WHUPS KalkWasser's ASS!!!

Hiya Alan

Lemmesee if we can explain your situation.

I have explored real-case for your reef,

with as little technicalities possible.

Near ZERO tds
pH ~ 8.5

TDS influence is non-existent, so purely ALKALINE SPECIES affect your pH.

eg) as mentioned, just a SLIGHT EXCESS Hydoxyl(OH) ion

YOUR RO product-water pH is nearly entirely dependent on the SOURCE/FEED . WON'T drift down near neutral(pH7)

You use CaCl2(unclear which hydrate/grade).

Practicality NOTE>
CaCl2 Solubility-rate UNAFFECTED, at any pH you will encounter as a hobbyist.

Although CONFUSING ,THIS isn't YOUR PROBLEM with RO/CaCl2 solutions.

[FONT=Arial, Helvetica, sans-serif]IF Your system ~2000L.

[/FONT][FONT=Arial, Helvetica, sans-serif]KW (vinegar-boosted) 16 L raises Ca by MAX 9.8ppm, under optimal conditions.

For 10ppm Ca increase, JUST 130ml, of HIGHEST CONCENTRATION Calcium Chloride solution in 1L of top-up water
[/FONT][FONT=Arial, Helvetica, sans-serif][basis of Seachem ReefComplete 160 000mg/L : 100 000mg/L Kent/ESV/]

For 10ppm Ca increase using Calcium Chloride salt, 10.5 tsp dissolved in 1L top-up water.
[basis of Seachem Reef Advantage Calcium]

Using bulk-chemicals purchased , may REQUIRE MORE and YIELD LESS than the above 2 examples. Nonetheless, they serve as an excellent template

I infer you may be "sukkeling" with the AMT of CaCl2 you feel can successfully dissolve in 1L for your Dose ?

If so, use 2L INSTEAD of 1L.

This way
~ LESS HEAT Danger
~Min volume added, max delivered ionic Calcium

No worries about unusual evaporative loss/top-up manipulations. Your present methods will suffice.

Oh ja, and Which ZEOLITE/BRAND do you use as RO prefiltration?

I ask, as they ARE ion-exchangers, and could be a source of RO product pH alteration .

Oh, and callme.

I'm back in phone range for a short while again.




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Calcium Chloride WHUPS KalkWasser's ASS!!!

Yip....and its been used for some time. No disputing its effectiveness. The question is its after effect...iveness. Are the concerns ungrounded.
 
Material for another thread ?

sunburst
Calcium Chloride WHUPS KalkWasser's ASS!!!

Yip....and its been used for some time. No disputing its effectiveness. The question is its after effect...iveness. Are the concerns ungrounded.
Click to expand...
I'll hand over to Obi-Wan/Liaquat

I assume these are concerns acc to publication/forum-chat?

Well, after a brief literature/internet survey, ANY CONCERNS are adequately dealt with.

Please, state YOUR concerns.

Is it about residual, or excess ionic species ?

I will use the "FORCE" and address these to the best of my knowledge, experience and references. :GEEK:

Your concerns are ungrounded IF

~You recognize ANY chemicals are dangerous if mishandled, stored, prepared incorrectly BEFORE we even use them.

~You adhere to all relevant guidelines . regarding dosage/frequency.
SPECIFICALLY in a closed, artificial, limited-volume biological system as ours are.

~You include waterchanges in order of <5% monthly MINIMUM.

Here's something else you may feel better knowing.

Some people are very concerned about the build up of chloride in a tank using it regularly, and are not in the least considering using it.

Randy Holmes-Farley
Well, there's not much I can do about that. Chloride is by far the most common ion is seawater, at more than 19,000 ppm, but chloride can build up. Craig Bingman showed in a couple of articles how much builds up over time. Unless you are adding a large amount for a long period without water changes, it does not rise too much. The articles are no longer on line]
Click to expand...

Maybe start another thread, or call?

I'm suffering - had to visit trauma centre due to eye injury, and typing is soooo difficult now.:41::arghh:
 
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