Originally Posted By: GT Mike
I've been using one bottle per tank (tank holds 20.5 gallons), but you can dose it a little stronger than that. IIRC, one (12-ounce) bottle per 12-15 gallons is what was recommended. Even at the ratio I'm using, it works fine. Maybe some time I'll dump in two bottles to a full tank and see if there's any difference.
Thanks for the reply, I'm going to try this stuff out soon.