I also thought about putting a sock in the first chamber. What kind of rock do you use? What would be a good in sump skimmer for this kind of setup?TheCanuck;4432150; said:Well if your doing that much live rock honestly you could just run a skimmer and power heads.... A refugium would keep nitrates down and expand time between water changes. So much for being froogle lol, i never buy live rock. If that is your plan to buy that much live rock then your idea with the refugium and skimmer would be perfect.