I know that vodka or vinegar is cheeper, pure sugar is even cheeper yet. IMO, the price of NoPox isn’t going to break the bank and it does a good job. also comes with published verifiable data. Just makes me feel better about it. I’ll run tests again this weekend after a week of 20ML/wk. tank is looking great BTW. Still not sure what caused my RTN event. I may never know.