I have a 2.5 gal nano tank that has some show guppies in it and I am building a little tiny sump from a little Rubbermaid tub that will filter the tank so I can have nothing bulky in the tank. In the sump I will have 3 sections one with a sock filled with carbon, one for the return pump (a whole 60 gph! That's a 24x turnover) and a section with some sand, freshwater clams and ghost shrimp. Sort of like a freshwater refugium. I want to put some plants in the mini sump for nitrate removal but dont know which ones. I though of a chunk of java moss, would that be good? Or would a small java fern or dwarf hair grass be better? Thnx I know this is a odd project but I want to see If it will even work
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