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Discussion Starter · #1 ·
Hello,

The 2nd hand tank I bought has a weir that sticks out inside the tank and I have sometimes found fish swimming in my sump. I stuffed pot scrubbies in there, which worked but looked junky and sometimes slowed down the flow in the overflows if they got into the wrong position. I've replaced them with Poly-Fil, however I had to do some adjusting when that started to get sucked down.

Any ideas on a better option for covering the weir so that the water flows freely but without fish?
 

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When you say weir are you referring to vents? Or a cascade over a solid wall? If it's vents I use fishing line weaved through only what it takes to stop the size fish. If it's cascading over solid wall glue on a slotted pc. Picture would help get a visual.
 
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