This requires a somewhat complex answer. Zeolites will absorb moisture but they cannot break down water molecules, when they reach a saturation point they will release water molecules until they reach equilibrium with the environment and then they will proceed to absorb excess moisture until saturation again. So at first, you may see a significant drop in humidity, depending on quantity and quality of your stones, as well as whether you have an open or closed system. We have an open air coop, 9x13, 30lbs of larger stone, and 80lbs of gravel/sand size. At best, we've seen a 15% decrease in humidity inside the coop, at worst it's equal to ambient air outside. However, we also use them inside our home, we have 20lbs, spread around 1900 square feet and this is a closed system, we get about a 25% reduction in humidity, and it prevents everything from getting damp, i.e. clothes, bedding, furniture, walls, prevents musty smells and mold/mildew from growing. The stones can be recharged, out in the sun (we don't get much sunlight) so we opt for putting them in our wood fired oven where they release water molecules and other gases ect. exhausted outside through the stovepipe/chimney. We recharge them when they seem less efficient, and this depends on what level of humidity we're dealing with, sometimes once a month, some every couple of months...the ones outdoors in the coop - once a month for the larger stones we have in the there, we don't bother with recharging the gravel/sand we have in there as we use that on poop boards. Just FYI, zeolites also remove ammonia. Hope this answers your questions.
Last edited:
