Smarchant22, you might want to pick that water change rate up before your fish get sick. I have a 120gallon with a FX-5 and a eheim 2217 and i do water changes every other day of 60-70%. Your fish may as well live in a sewer man. Water changes are very important with discus and all other fish actually. GIve those guys a good variety of food also. romosoldier id go bare bottom with those juvies, its the easiest way to do it, the more the bare the tank the healthier your discus with will be and the faster they will grow. Juvies need a lot of food also, fed them atleast 5 times a day