No chemicals are used in its function making it safe for fish. Unveil the enchantment of a mist in your own back yard. Give your outdoor fish pond added flair with this triple membrane water fogger. Place your fogger into a floating ring, so it stays out of site while making your pond come alive with multi colored fog. This water fogger uses the water from your pond or large water body to create a beautiful fog, without heating the water or making it unsafe for fish.