Alright, so I got about 40 Molly fry. I keep them in a breeding net in the 55 gallon aquarium but it's h**l to clean up. So I bought a 3.5 Gallon cheap aquarium (for 10$ at Wal-Mart). I was wondering, should I put san don the bottom or gravel? With gravel the fry get stuck under it sometimes and dye, but I'm worried sand particles are too small, So I'm not sure, I got bought though.
What do you suggest?
(Ps, I got a sponge filter, decorations and heating...)
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