all the chambers are for different things, some for live rock, one for skimmer, one for chetto, one for new fish to acclimate or a healing chamber the rest just more water for the return. what i plan on doing when doing water changes this will allow me to remove 40 gallon of water and drip or slowly pump 40 gallons back . this will be all sps maybe a few chalice and zoas. mainly be sps.
Well, I have an acrylic 300 and Sat will be 2 years since it was set up. I do use a closed loop with 2 darts and 11 return holes, 3 on the bottom and 9 on the back. If I had to do it over again, I'd have added a few more down low on the back. I also run a full size Tunze and a Tunze Nano wave box on either end. Pix should be in my sig.