I just bought a 120 gallon tank I'm wanting to build one of the diy canisters for the filtration. I'm thinking they heaters to maintain the temp maybe a power head on each end for circulation and two air stones to keep oxygen levels up. I'm going to keep community fish I'll hit the stocking forums up once I figure out the build. Anyone using one of the diy canisters with success and have any tips for putting it together? Thoughts on the above setup? The pickup and return will be going near the center of the tank heaters on either side of that and then an air stone and power head on each end.