Sump Turnover

[phi delt reefer]

I think your math is wrong - someone else correct me if i am doing this wrong.

125 display + 55 sump = 180 gallon total - 15% (i randomly selected this to compensate for lost water volume due to rocks, coral, account for water level not being at top of tank, etc.)

so you have lets say 153 gallons of water. turnover is corrected return pump rating divided by total SYSTEM gallons.

I am assuming you only had 4 feet of head with no 90's or divides - so we will use the full 1500gph rating

so 1500/153 - means you had 9.8x turnover

pump recommendation - I have heard a few Eheims and have a 1250 myself (not hooked up yet) - they are dead quiet. Maybe score a 1262 which is about 900gph (dont know the head rating) but that should slow down your flow to where you want it.

do you have a closed loop or sufficient power heads in the display to keep things moving nicely up top?