I'm in the process of rebuilding the sump, heater and UV light system under my Perfecto 5' 125 gallon aquarium. Goal is to stock with red spotted green discus from the Rio Nanay. Accordingly I need to slow down the flow rate of my (plus have a spare) Aqua-Mag Magnetic Drive Water Pump Mdl 9.5. It has way too much water movement given where these fish are collected.
Any suggestions on speed controllers are appreciated.
Photos: door added for easy access to sump; hardscape layout; back view with sump and water heater.