DIY Overflows ?

[msp2673]

I plan on drilling a 125gal flat back hex (72x18x24) for custom internal overflows. (The tank has only two bulkheads on the top center of the back panel.) I have a couple of questions. Which would be better, 2 corner overflows or 1 in the center of back the panel? What should the length & width dimensions of the overflows be? I'm also assuming 1.5" drains, should the returns be the same?

[msp2673]

Anyone?

[Bebo77]

thats up to you.. i have dual overflows on my 300. what do you like better? 1 or 2 center or somewhere else...

http://i9.photobucket.com/albums/a60/Bebo77/pics021.jpg
http://i9.photobucket.com/albums/a60/Bebo77/pics022.jpg

how many gph do you want to move through your sump? you may be able to get away with 1 1.5" drain.. i move 2000 gph through my sump but thats considered alot....