jonboyb;352465 wrote: OK, threw some Phosban in a media bag (or wife's pantyhose that is) and put it in the rear overflow for the time being. I'll try to locate a good test tomorrow. I guess I just made a mess when I vacumned that patch of sand. Not a bit of algae anywhere else in the tank.
That is good temporarily, but for best use of the phosban you should have a reactor. I use the Phosban reactor for my GFO and have it is a fluidised state, same way Phosban is supposed to be used.