I have 2 hydor koralia evolution powerheads. I would like to make sure a nudibranch I plan on getting does not get sucked in. Is there a cover for these? If not, could I use vortech covers for mine? Or any other ideas? Wrap it in media?
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Could you tell me more about your covers? Any pictures?I dont see why not? I made mine out of materials from JoAnns Fabric store and i've had no issues over the last two years. I clean them once a month or as needed.

