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I've been "shrimping" for a few months. Primary tank 20G, HOB w/ sponge prefilter, heavily planted. Cull tank 10G, and now multiple 5G tanks so I have have a few different colors. I am switching my 5 gal tanks to sponge filters. I watched a couple of Cory's videos, and I also read AqCoop articles. Here's my question: My baby shrimp are small, small, small. They will clearly fit through the coarse sponge holes of the 6 sponge filters set-ups I just bought from AqCoop. Is that okay? Will they just swim out the top? Image 1: about 7 of the little tykes (maybe a week or so old) in between the rock and the fine prefilter sponge I took out of the main tank and set in for biofilm. Image 2: mighty might on top of the fine sponge in the tank with the coarse sponge just outside for comparison. Thank you for your help!