03-01-2011, 06:26 PM
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Is it really 1 drop per gallon? I've been wondering how to do smaller doses of it (I have a 20g tank). I have an eye dropper, but wasn't exactly sure how much to use. I know it says that the first thread mark on the cap is enough to treat 10g, but the thread marks are slanted, so that seems pretty vague. I tried sucking up that amount in the eyedropper and it seemed more like 15 drops. Is 1 drop/gallon really enough? Seems like such an imperfect science. I don't want to waste it, but I don't want to harm the fish either (with too little, sounds like it would be hard to OD on it). Btw, my tank is still (still!) cycling and I have pretty high nitrites. I'm doing daily or every other day 50% water changes and using Prime, so it probably can't hurt to do a little extra.