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How to make a water skimmer nano fish safe? Anyone have working solutions? I'm at my wits end.


Mr Aqua Man
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Hello friends, I hope you all are doing well. I'm a first time poster here but long time (subjective?) follower of Aquarium Co-Op.

I'm sad to report that I have inadvertently killed some fish with my water skimmers and I've tried many possible remedies including various sponge additions and mesh fabric. Nothing has yielded a viable solution yet. However, I do think my tank does need a surface skimmer since I have a heavy bio-film build up and am running C02 so need gas exchange. In the interim, I'm running oxygen injection which I normally don't do but I can't currently use a surface skimmer as it is resulting in dead fish =( . 

The fish I'm keeping are CPDs, a few Dwarf Emerald Rasboras and now, 2 less Chili Rasboras as of this morning :classic_unsure: (I tried another solution to the problem but didn't work). Collectively, all of these fish are small enough to get sucked into my surface skimmer even when blockers are installed. Before I post pictures and provide more explanation, I wanted to see if anyone has derived a solution to this problem?

Thanks for all your help.

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On 9/16/2021 at 1:46 PM, Mr Aqua Man said:

Hello friends, I hope you all are doing well. I'm a first time poster here but long time (subjective?) follower of Aquarium Co-Op.

I'm sad to report that I have inadvertently killed some fish with my water skimmers and I've tried many possible remedies including various sponge additions and mesh fabric. Nothing has yielded a viable solution yet. However, I do think my tank does need a surface skimmer since I have a heavy bio-film build up and am running C02 so need gas exchange. In the interim, I'm running oxygen injection which I normally don't do but I can't currently use a surface skimmer as it is resulting in dead fish =( . 

The fish I'm keeping are CPDs, a few Dwarf Emerald Rasboras and now, 2 less Chili Rasboras as of this morning :classic_unsure: (I tried another solution to the problem but didn't work). Collectively, all of these fish are small enough to get sucked into my surface skimmer even when blockers are installed. Before I post pictures and provide more explanation, I wanted to see if anyone has derived a solution to this problem?

Thanks for all your help.

What type of surface skimmer is it? I had an issue with Eheim's 'eating' pygmy cory's and ended up designing and making a replacement skimmer cup for that took the skimmer openings and made more of them, but smaller with a taller weir to prevent them from getting in. 

If you have a different type of skimmer you could get away with a coarse sponge, but it all depends on how the skimmer stay's level with the water.

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