I have
extremely hard water, and all my fish do great,
Just curious.. But Has your water ever been water tested for human consumption?
I just say that because both my neighbors on both side of me can't seem to keep fish alive.
They ended up sending off samples of their water for testing and was shocked at the results,
They both are installing 2000.00 systems to make it safe,
They listed off some of the things found (long list), I do recall the warfarin levels being way up there.
Mine for some reason is different then most. the only reason I can figure is, my well is dug, everyone else's that I have spoken too is drilled.....
What started this was my son moved in next door and took his fish with him,
They slowly died off no matter what we did or tried.. So the remaining ones I brought back home, They perked right back up and are doing fine, The neighbours on the other side have tried keeping a few fish for yrs but they always end up dying on them...
So I do know water source can be a big problem..