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Discussion Starter · #1 ·
I have a 125 gallon tank I'm setting up for some of my African cichlids. I bought the universal rocks crystal wall 3d background. It's one of there thinner models, only sticks out 3" Max in some places so there is not much of a gap between back of backgrounds d and back glass. I have a fx6 and a fx4 that I will be running the tubing behind the background and drilling a hole for the inlet so the only thing on the front of the background are the actual intakes. I'm not delivering the background to the tank I will be using clips to hold it. My concern is the water behind the background becoming stagnant. I was thinking of drilling some small holes in spots where I can't see them and since the fluval intakesare able to take in water from all sides I would still some holes behind where the I take is. Hopefully the intake will draw water from behind background and the speratic holes around the background will draw water to the rear of the background. Not sure if this would work. Would love to hear suggestions and if anyone has 3d backgrounds what they did.

Thanks
 

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I have 3D backgrounds with intakes behind. They are siliconed to the glass bottom and sides to keep fish from behind the background. There is no debris behind.

I have 2" holes cut in front of each intake. The suction and flow of water through the holes and across the entire bottom in the space behind the background keeps things clean.
 

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Discussion Starter · #3 ·
Yeah, I'm starting to think it might be easier and cleaner to just leave them behind the background , would be more estheticly pleasing without seeing any of the intake. Anyone else havr any input / experience ?
 
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