What chemicals can you add to the diatom powder? I cannot find any information. We have very hard water.
Thanks,
Sara

Thank you SO much for your help. We change the water. Have sponge filters. We will try the meds you told us about. Again, I really appreciate your help.
Sara

Please help!!! My plecos are dying. Their belly turns black. I have no idea what is causing this. I have attached pictures for you to see. I would appreciate any help....have no idea what to do for them.
Sara