I currently have a 75 gallon tank. It has been through the nitrogen cycle. I just checked the nitrate, nitrite, ammonia, and pH. Everything was good except pH is a little high at about 8.0. I have one Oscar as well as 2 blood parrots. They are all juveniles, and I understand that eventually the tank will be too small to hold all 3 fish comfortably. Honestly, I didn't realize until after I purchased the fish that the tank would be too small. I wish I would have purchased the Oscar and let him have the tank to himself. Anyway, my blood parrots seem very scared and nervous. They instantly drop to the bottom of the tank and find a place to hide as soon as they see me. Sometimes they are completely still for hours. My Oscar seems to be doing okay. Based on the research that I have done it seems that he is doing more pouting than acting scared. I just want to know if there is anything that I should do for my blood parrots. By the way, none of the fish have never acted aggressive toward each other including the Oscar. Sometimes they all hide together in the same spot so I don't think the combination of fish is the problem.