So i decided to set myself up a frag system and need some input. I will be using 3 15g tanks, 1 lps, 1 sps and one for a sump. Im gonna try to use what i have on hand which is a queit one 4000 return pump(will it be enough for both tanks?) and a 400w halide which i was thinkin of placing the tanks back to back and mounting right in the middle of the two. Another question is how do i pump both tanks to the sump? I am far from a plumper and this will be the first system i have ever used a sump on. Any input would be appreciated!