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- Oct 17, 2016
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Good morning R2R. So i'm moving from a 29g biocube into a 125g display tank w/ a 55g sump. I have no idea how the sump works/operates. I have included two pics. My assumption is that the water is going to enter the sump on the right hand side of the picture, pass through my skimmer, and then I'll need to add a biological and chemical filtration somewhere after that. The sump is drilled in the lower left hand corner for the return which I have a pump for that as it was included w/ the sale. Can someone direct me to a good filtration system that I'll want to use in this set up. Also, the sump itself is 4' long, 21" tall and 1' wide. Thanks for any help/insight you may have!


