vodka dosing on small system??

[evaneatspie555]

i have 30 gallon tank and small .5 refugium with a taam rio nano skimmer so in all i have about 25 gallons of water. wich to my understanding is the dosage size (0.1ml per 25gallons of water ect) would u recomend this method fr a smaller tank or is overdosing to high of a risk in a small tank. if so what are some less expensive alternatives to less nitrates, phosphates and clearer water ??? any help is appreciated