Replace the filter and clean the sponge when you do the next water change. The filter and sponge could be holding what ever is causing the slight rise in ammonia.
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Replace the filter and clean the sponge when you do the next water change. The filter and sponge could be holding what ever is causing the slight rise in ammonia.
John
"Critics are men who watch a battle from a high place and then come down and shoot the survivors." Ernest Hemingway
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