I vodka (ethanol) dosed for a while and had good results, but having done similar reading (and fought cyano issues a bit) I would probably go with Vinegar were I to start it again. I think you will see positive results and cut back on your algae growth, but I would tackle the problem on another front as well... determine where these excess nutrients are coming from and reduce that input. I would make a couple of suggestions on starting points: buildup on mechanical filtration is decaying (clean daily), detritus buildup in dead zones in your tank or sump, inadequate protein skimming (this will become far more critical with vinegar dosing), over feeding... it's hard to say without knowing a bit more.
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