I know that I've written about this before, but I just lost another cory (3 total now) and it's just so upsetting! It's always the day after a water change. I did a 20-25% water change last night and today, one of the cories is trying to swim but only doing spirals and crashing to the gravel. I transferred him to my QT
, but it didn't matter. They never last long once they start doing that.
I've tested everything a million times and the ONLY thing that I can come up with is that my tap pH (8.8) is a lot higher than my tank (7.2). The tank has a big piece of driftwood, which I assume is the cause for the decrease in pH.
I know that many people are against adding chemicals to neutralize pH, but what else can I do?? I leave the water out in a big rubbermaid for days with declorinator in it and it's still high.
Other than chemicals or maybe adding a big piece of driftwood to the rubbermaid, what can I do? I know that people said to do smaller water changes, too, but doing tiny water changes every other day is just so tedious and I plan on having this tank for a long, long time. And it's hard when vacuuming gravel to keep it to a small amount of water...
I get so upset when I lose fish!!!