Fish Getting Stuck on Power Head - The Planted Tank Forum
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post #1 of 5 (permalink) Old 12-29-2017, 03:05 AM Thread Starter
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Fish Getting Stuck on Power Head

I was just adjusting my CO2 timer and upon looking up I saw one of my guppies stuck against a Hydor 240 gph power head. I turned it off and the guppy went about its merry way. I observed the same thing with an otto a year ago and no telling how long he was stuck. I don't think he survived...I went from 4 to 3 ottos after that an never found the 4th one.

I'm happy with the extra flow the pump provides, but do I have a fish killing machine in my tank? Or are stuck fish a symptom of something else?
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post #2 of 5 (permalink) Old 12-29-2017, 02:04 PM
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Are you sure they're actually stuck and not just hanging out?
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post #3 of 5 (permalink) Old 12-29-2017, 02:26 PM
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You do not have a killing machine haha. In my experience, a stuck fish is not a healthy fish. A strong, healthy fish should have no problems swimming out of the intake flow for the power head. I've got the exact same power head that runs during lights on, had it for a year and a half. Once in a great while, I'll have a white cloud that'll get stuck. They always have an underlying issue.

My oto's frequently hang on to it though. It grows a nice layer of green algae that they love to chow on. They have no issues sitting directly on the intake and then swimming away though.
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post #4 of 5 (permalink) Old 12-31-2017, 07:07 PM
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If you want to make sure fish aren't able to go through you could wrap the whole thing in a nylon bag or sock. This won't affect the flow rate and will prevent fish from becoming ground up fish.
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post #5 of 5 (permalink) Old 01-01-2018, 12:37 AM
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I agree with mgeorges as to your circulation pump. I have a couple AC70 powerheads that could and did suck in some healthy fish. I switched to a huge dual circulation pump and while it will collect fish that don't make it for whatever reason, it will not suck in healthy fish. My dual pump is like 800gph... so the 240 isn't going to suck in a healthy fish.

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