how to return from the sump

[tdragon]

i was thinking of drilling 4 holes in the back or comming over the top. wich one do you think would be better? heres a pic of the back.

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in the pic its drilled with 2 1-1/2" drains on the right. and the red dots are where the returs would be.let me know what you think

J

 

[Scuba_Dave]

I went over the top with my 125g (can't see them with the hood) - to avoid drilling as many holles aspossible. I have 1" PVC thatthen divides down to (3) 3/4" feeds w/ball valve on each. At the end of each 3/4" feed is a 12" flex tune with 3" flare nozel.
I can adjust the flow to each, and point them anywhere I want.
In the picture you can see (2) of the 3/4" feeds

 

[Scuba_Dave]

Here's a better pic, the return comes from the far end of the tank. The draisn are at the far end too. I'm using an Iwaki 70 - getting a little over 1400g per hour. Drains are 1.5" bulkheads, one of these can't keep up with 1400pgh.

 

[dedfish]

One thing to keep in mind if you drill...if it's a return from the sump what is going to prevent the water from draining the tank in a power outage? The two lower returns in your picture would be a problem.

 

[tdragon]

yeah i thaught of that after so im going to go over the top with the return

J