[unclejed]

The poly reactor comes with one. There is really nothing to it, buy it, add the phos-lock, add the water, set it where you want (mine stands next to sump) plug it in and that's it. Once a month change out the media. Another thing is that flake foods have phosphate and so do most frozen. I stopped the flake when I got the reactor. Thaw your frozen then add water (pure) then drain the water and add a little more to keep in fridge.