We have a small fountain that runs 24-7 in our birdcage. We have always used bromine glandular powder from the pool & spa store. Use only a "tiny bit" literally! You don't need to change the water. It will clear up on its own. We also use it in the cement bird bath in our garden . Keeps the water clear. ONLY A LITTLE SPRINKLE! One small bottle lasts about a year or more. We have been doing this for many years. Give it a try.
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