June update.
Sump remodel is doing its job fairly well. Water is crystal clear again and fish are growing way too fast. Trevally are probably 12-13", snapper not far behind, and the Queensland grouper is probably 7" or 8" from the little 5" spec when i got him less than 3 months ago.
Bad news, Barracuda got killed and eaten by the trevally. The Palometa fish (Trachinotus goodei) kept getting bullied by the snapper and trevally so is now in my sump until it gets big enough to hang...