By this I mean the chemical part. I have a small pump I can recirc my lines with. I just ran out of BLC (I have a pretty weak mix circulating right now). It seems like a bottle does not last that long because you have to use quite a bit of it (1/2oz per quart). I usually use about 6 quarts because it adequately covers the submersible pump.
So is there a more cost effective option that's just as good?