I've had chickens for for about 18 months now & used this system for as long as the girls have been outside. I change the water every 7-10 days & put ACV in the water. Last year being new to chickens, I began to putting ice bottles the cooler almost immediately in an effort to help the pullets through the hot California summers, a practice I discontinued as the weather cooled. I noticed as the weather warmed this spring the cooler was getting a little funky, mold growing on the sides at the waterline & the lid even though there's ACV in the water. I was rather displeased! The temps here are moving from warm to hot so I am again putting the ice bottles in the cooler, the water is no longer trying to evaporate in the cooler & condense on the sides & lid. Mold problem solved! Just thought I'd pass this along to those using this type of system, probably already know, but hey, maybe it will help someone.

