I've learned the hard way to stop chasing ph if I want my fish to live. There were 18 guppies, now there are 3. There were 6 neon tetras. all have gone. Most of my 41 fish survived but lost 15 guppies and 6 neon tetras. I used acidic buffer and alkaline buffer and followed the directions. Just do not. I have a 60 liter tank. Now I just used the water from the filter and I haven't had any dead fish since.
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