I have a 50 gallon tank that will be used to house and raise fry of different sorts I hear sponge filters are best for this and I understand how they work and how to build them. Is there a way to make them better? I was thinking of making 4 and have them connected 2 each one in each corner will this not work? Do I only need one or two sponge filters or would say 4 smaller ones work better since they cover more ground? Any picks of your diy please feel free to post
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