how much vodka?

[joekidwell]

Does .4 ml of 80 proof sound right for a 40 breeder?

[joekidwell]

Forgot to mention the fuge holds about 18 gallons so its 58 gallons total

[bertoni]

All I can do is quote this article:

http://www.reefkeeping.com/issues/2008-08/nftt/index.php

They suggest about 0.3 ml for a starting dose, so 0.4 likely is close enough.