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 Post subject: Let the cycle begin!
PostPosted: Mar 20th, '18, 23:40 
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I hope to start a small system next week(900l ibc tank, 2 bio filters of 100l and 200l).
The water i want to use has a ph of 9. I read a high staring ph is good for the bacteria, but so high?
How can i bring it down?


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 Post subject: Re: Let the cycle begin!
PostPosted: Mar 25th, '18, 09:12 
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That's a really high pH. I'm not sure what's in your water, sometimes it comes down on it's own through bacterial action, sometimes you can lower the pH with acid and other times it's tough to get the pH down. You could try hydrochloric acid but use caution it's a strong acid. Try adjusting a known amount of the water with hydrochloric acid and note the amount needed to lower the pH to about 6.5 to 7.5. Let it sit a few hours and if the pH goes back up adjust it back into that range - keep doing this until it no longer drifts. You should know the amount of acid needed to adjust the known sample and this will be proportional to the amount of acid needed to adjust the whole system.

Might want to wait and see if the pH of the water you're going to use drops once it's just been sitting around for a day or two (try this before doing any treatments).


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