Keep toxic ammonia at bay with high-quality Zeolite filter media. Cobalt Zeolite Filter Media is a must-have chemical filter media for koi and goldfish ponds that commonly experience ammonia spikes. Ammonia buildup due to heavy stocking, overfeeding or large koi can quickly create a harmful aquatic environment. Use Cobalt Zeolite Filter Media to remove ammonia as well as odors and heavy metals. 10.6 oz jar includes a media bag for easy use and replacement.
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