High ph in ro water - The Planted Tank Forum
 
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post #1 of 2 (permalink) Old 03-16-2019, 04:33 PM Thread Starter
Algae Grower
 
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Iím starting a new thread because I donít want to hijack someone elseís.

Iíve been using NilocG gh booster and K2CO3 to raise the gh/kh of ro water. I use a 5 gallon bucket filled with ro, mix in 6.5 grams of gh booster and 2.3 grams of K2CO3 then let it sit with the lid on for several days. When I tested the water the ph was 8.8+. I tested the tank I put the water in and the ph is ~7.6. Iím wondering if leaving the lid on my water change bucket kept the ph up somehow.

Iím going to try running an air stone in my mixed water for a while to see what happens.

Aerating the water seems to help, getting about 7.5 ph after a few hours of the air stone.

Last edited by Darkblade48; 03-17-2019 at 06:14 AM. Reason: Please use the edit function for back to back posts to keep threads cleaner
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post #2 of 2 (permalink) Old 03-19-2019, 10:29 PM
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Anytime you use an alkaline buffer to raise the KH, the PH is going to follow accordingly until gas exchange equalizes the water with ambient air. That's why aerating speeds up the process. Keeping a lid on the bucket will restrict the equalization.
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