William Bettering (Hobbyist) on Wednesday 13 October, 2010 Product Rating: Review: My koi freaked out every time I used this product. I was told I was bringing the pH down too quickly and it stressed them. I stopped sing it and just let the pH be high, the koi don't seem to care at all. Cindy Badder (Hobbyist) on Wednesday 24 March, 2010 Product Rating: Review: I can't endorse a product to lower the ph.
Do a water change. If you need something to stabilize, use Baking soda. No matter how much you add, it'll stabilize at 8.3.
Look at the reason your ph is up first and always always check ammonia first
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