I've got similair sized tank (145g) with a 75g sump.
The sump basically is a 75g drilled for a 1.5" bulkhead (external return pump). It came with glass siliconed on the sides for eggcrating and foam but ended up just using 3-10" glass panels for over/under/over baffles and seems to be working ok.
Though FOWLR doesn't need as much flow as a reef tank but unless you have a closed loop or planning on power heads for the tank you be relying on the sump for flow. Should figure how much flow you want/need and size from there. Also for sizing sump consider the foot print of the skimmer your planning.
Noise was a concern for me so in addition to the CL bulkheads I have 2-2" drains and 1-1" return (two overflow towers) using Dursos and probably 1000gph from the basement sump return. Water is dropping ~2" and noise is about what you would hear from some of those table top fountains. Now if the Dart on the closed loop was quieter I'd really be happy.
Last edited by mark; 05-04-2006 at 07:54 PM.
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