I have a 33 gallon tank with two filters. I changed the water, washed and installed the new filters. An hour later, the aquarium slowly began to turn green. The next day the water was green with algae and my fish were dying. I did a complete water change again, cleaned everything, threw out the filters and first emptied the pool without a filter. The water was clear for a week. I put in two more filters and an hour later the tank turned green again. So upset!
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