When I do hypo I actually use live rock as the filter I keep a couple extra pieces in my sump just for this reason alone I swap out the pieces every 3 to 7 days I also place a powerhead at the bottom of the tank and a airline to it so that it will pull in oxygen There are a few species of fish but do not tolerate hypo
I do eight eight to ten week treatment at 1,009 and keep up with weekly water changes I feed on a regular schedule as well
__________________
........
|