Hi Luke, I have a breeding group of L260 in there, 2 L177, 5 L239 and a small breeding group of L134 in there. I am hoping that the L239 will eventually breed in there. The discus don't mind it, but they don't like to be in it all the time. They will go to the corner where the flow is a lot lower, beside the powerhead, when they want to rest. I need that flow in there to keep the L260 breeding. It doesn't seem to bother the discus when they are hungry.