My water is very soft, but all tank water has been run through a calcite filter to raise the PH. I had the calcite filter to protect the heat exchanger in my geothermal heat pump that used to heat my hot water. I use water after the calcite filter , but before the water heater, in the tanks.
I feed BH mix twice a day, Tetra Bits once, and FDBW once.
Maybe I need to add a vitamin/mineral tablet to the BH mix. I did that decades ago but for some unknown reason did not add any to this mix.
I don't want this to happen to my tank of young Discus. Any ideas on how to prevent this?
Years ago I had a well 400 feet from the well I have now and did not treat the water other than running it through a large GAC tank.