Noticing a lot of you guys who are big into the flowerhorn game always have some type of oxygen going on in background of you flowerhorn pictures. I think I've read theres something to this but don't remember what it was all about. Can somebody please explain why you guys do this? Also, if its so good for flowerhorns, what about other fish? I run 1 HOB on all of my tanks, and one hydro 5 sponge filter is this sufficient or the more oxygen the better? Thanks in advance guys.