Hi everyone. This is my first post in the discus forum. I come to you because my friend (who doesn't belong to this site) said he was interested in keeping discus. I told him that I would check with you guys. He currently has a 55 gallon predator tank (Puffer, bichir, pictus cat) and he has finally decided to change it into a discus tank. I know he is capable of taking the next step to caring for discus. He will be getting rid of all the fish and cleaning the tank out to start over. My first question is: Can he keep discus in a 55 gallon? If so, how many would be good? I know discus are very picky about their water. Is there any equipment or water additives that you would recommend for Discus? My friend has a small rena filter (I don't know which kind yet, but I assume its XP1) as well as a Power Filter. He is willing to upgrade or replace filters, so what kind of filtration do you guys recommend? As for tankmates, I told him to get some Cardinal Tetras and Cory cats. Are there any other tankmates that would go well with discus? Sorry for all the questions, but he is eager to get started this summer.


