So I had my honey hibiscus wit (using WLP400) in a swamp cooler for about a week to keep temps down at around 64 - 68*. I did this on the fly as I noticed the esters that my first batch threw off due to temps rising to about 75* using notty, and didn't want this to happen to this batch. Question is how far up the side of the primary does the water have to go in order for the swamp cooler to be effective? I had it almost level with the top of the wort. Is this necessary, or will 6" of water or so work? Also this yeast "the WLP400" threw off the rhino farts and after 2 Weeks still hasn't subsided much and still has krausen. Ambient temp in brew closet is about a steady 68*.