You need more pumps.
As corals grow you end up with the issue of corals not getting enough flow. That may not be your issue yet, but if you're struggling to get proper flow before growth things are only going to get much much worse.
for a 4' tank i'd go with 4 pumps. Two on the back, two on the side. And no matter how strong you think they are, you probably need stronger ones. I'm running two 6095's rated at 2500gph each in a 45g cube (50 cube but shorter)
Over 100x flow? You rocking bb there?


