I do vodka/vinegar. But I have no idea what ratio. I was doing zeostart before, but that stuff is too pricey, so when the bottle ran out that I dose from, I just put vinegar in it. No change in the tank. Then when the vinegar was almost out, I tipped it off with straight vodka. No change. Mind you I am probably the last person that you want advice from because I haven't tested any parameters in a few years. But my tank is doing well though.
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