Cinnebuns Posted December 14, 2021 Share Posted December 14, 2021 (edited) I have been doing a fish-in cycle for 3 weeks now. Just now I noticed one of the 2 HOB filters I have running (aqua-tech 10-20) has water falling out the wrong side. I also noticed the out has much less flow than usual. I even usually attach a cut water bottle to the end. This is my first 3 weeks ever with fish. I assume I need to clean the filter cartridge and that is causing a backup of water. What worries me is losing much needed bacteria during a fish-in cycle. Sorry the pics might not help the best. I tried to attach a video but couldn't. Is that what's wrong with the filter? What's my best course of action? Edited December 14, 2021 by Cinnebuns Link to comment Share on other sites More sharing options...
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