Hey all, I am planning my next tank build. It will be a 340 gallon tank (130"x24"x25"). I am going to do 4 separate closed loops. Ill attach the picture. each color is a seperate closed loop being run by either an ecotech vectra L1 or a Reef Octo Varios-8. Im not sure which pump to go with. I was originally planning on doing the 4 vectras but I kept finding negatives reviews about running them externally and as closed loops. Flawless from what I've read in the water but an accident waiting to happen if oyu run them externally. Would love some personal feedback about either pump if anyone here has ran one on a closed loop.