[globaldesigns]

Here is the actual recipe for dosing vodka:

1. Your first step is to test your system’s NO3 and PO4 levels. Do not try this method if you don’t know this!

2. Estimate the net water volume of your system. The water volume is the sum of the aquarium volume, the sump and refuge minus live rock displacement. It is ok to underestimate the net water volume but it is risky to overestimate it.

3. Start with 0.1 ml of vodka per 25 gallons (100 L) daily for the first three days.

4. Then, double the daily dosage to 0.2 ml per 25 gallons (100 L) for days 4 to 7.

5. On week two, add an additional 0.5ml to the daily dosage, regardless of the aquarium volume. Always test your system’s NO3 and PO4 levels. If your NO3 and PO4 levels start to drop during that 2nd week, maintain the current daily dose. If your NO3 and PO4 do not drop, add an additional 0.5 ml of vodka to the daily dosage on week three. Add 0.5 ml to the daily dosage every week until your NO3 and PO4 start to drop.

6. When your NO3 and PO4 levels drop near undetectable levels, cut your current dose in half. This will be your daily dose.

7. Keep dosing vodka every day (the dose on point 6) and keep monitoring your NO3 and PO4. If levels become detectable again, increase your daily dose by 0.1ml per week until the levels start to decrease again. Your NO3 and PO4 levels will eventually drop back to undetectable. This will become your new daily dose.

NB: Those instructions are for 80 proof vodka only (40% ethanol by volume).