Yeah. Switching substrates is the last thing I want to do. almost 3 weeks into this new tank and between upgrading my lights and buying test kits ,flora max sand and driftwood has added up. I may just let the tank set it's course for a few weeks and hope everything continues in the right direction. Maybe I'll try some peat moss hopefully that will help a little but if going threw this kind of trouble every water change. Make me question if it's really worth it for one discus. Although I love my rams. Have a nice centerpiece fish is still in plans. as of what might take some rethinking .