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Looking for suggestions on why the bacterial bloom (and white foam on water surface) in my aquarium is not going away. The water pressure kept slowing in my filter, so I would try to rinse the filter pad to keep beneficial bacteria, and after awhile would need to replace because water would not flow through (one every 2wks). I keep two in the filter at a time, and occasionally rinse the whole filter for maintenance.
Noticed a thin layer of foam, so I did a 15% water change and scraped a sponge-sized amount of algae off the glass around the top of the tank. Within the next 1-2 days, cloudy water. Initially I didn’t do anything, (except add an air stone), so that it would clear up on its own. After over a week, no change. I did a 25% water change and took out an artificial plant to clean, nothing. Later used recommended amount of Fluval BioClear enzymes, no change. Second dose, no change. Waited a week, (and added a sponge filter), no change. Added a new filter so that the old one and new one were running together for a week. Then vacuumed the tank and did a 30% water change. Another week has gone by, no change. Ammonia, nitrate, & nitrite are all 0. PH is 8. My Raphael Catfish and I would greatly appreciate any help for his 30gal home.
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He mentioned the size in the last sentence of his first post. Don't lightly scan the post next time, lol. Try turning off the lights if you have a bacterial problem...? It's not too late to buy a new filter to add that might do the trick. I'm not too knowledgeable but I can come up with ideas at the least.
 
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