Step 7: About 8-12 hours later (try to pick the same length of time after dosing each day) measure your phosphate and nitrate levels and record them in your Reef Journal. Step 6: Repeat the same thing, once a day, for the next two days (three in total, including the first). You can use a dosing pump, start a siphon, or simply slowly pour it into the sump yourself. Step 5: Scoop out a liter or two of tank water in a reef-safe container and add your vodka to it (diluting the vodka) and then slowly add it to your sump. Step 4: Double-check your measurement to be sure you didn’t measure too much. For my 92-gallon tank, I need 0.37 mL of Vodka Step 3: Measure out 0.1mL of vodka for every 25-gallons of tank volume. So I’m going to assume those volumes just about cancel out and therefore my total volume for this calculation is about 92 gallons. Step 1: Determine the size of your reef tank, in gallons (technically we are looking for the water volume here. I have a 92-gallon tank + a 20-gallon sump, but I also have a lot of live rock and sand. I don’t recommend using something like maple syrup, which is extremely expensive and has other things in it besides plain sugar, but you certainly could use a sugar solution as a source of carbon if you prefer. Technically, you could achieve the same results by using sugar-and some people do. 
In the case of vodka dosing, the aquarist has chosen ethanol (ethyl alcohol) as the organic carbon of choice-but other organic carbons could also be used. The chemistry involved behind the scenes is actually not specific to vodka-it is ‘organic carbon’ dosing. Vodka dosing is a technique to reduce or even eliminate detectable levels of nitrate and phosphate from a reef tank. Let me share some of the benefits of vodka dosing in a reef aquarium with you by answering some common questions: What is vodka dosing in a reef tank? Vodka dosing in a reef tank is a proven method to improve water quality by removing nitrates and phosphates from the water.
This sounds like a strange concept-and it is-but it works.
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