A refugium is the only place I'd use a DSB.. As for oxygen deprivation that just allows for the anaerobic conditions needed to allow for Natural nitrate reduction to happen .. The plants will re oxygenate the water when lights are on. I remember when refugiums where simple. I use a refugium 1/10 the total size of the system its to support then flow 1/10 the fuges total water volume through the thing per hr. 100 gallon tan a 10 gallon refigium then 10 GPH more or less through it. This simple formula has Been working for me and many of my friends for many many yrs. _________ Some of the world's greatest feats were accomplished by people not smart enough to know they were impossible (Doug Larson) |