I'm starting a 20g reef based around a jawfish. it currently contains 30# of LS and 20# of LR. Well I would like to get an ECONOMICAL skimmer for this tank. I ordered a visi-jet from Big Als but it seems too big. Only major modification of my hood system and rearrangement would it fit. I currently have 2 402 powerhead and plan on making a mini refugium out of a Aquaclear 500. so the space in the back is limited. Do you folks have any suggestions for a skimmer?