Here is my 25 with 250 DE but I run a chiller as heat is a problem. My fuge has a 175 SE and it runs a lot cooler than my DE.
Hope that helps you out a bit.

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150 Gal system 3'x3' 400W M/H, Bekett skimmer, Dart return,1/4 HP Chiller
180 Gal Drop tank, LED lights, Bubble master 250 skimmer,Hammerhead on a closed loop, Speed wave return.
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