Yes, any aquatic plant will remove nutrients. Hyacinths are good for doing that, and in your area, because of the cold winters won't become a problem like they do down South. GC like them tho..........

Ya just gotta research what plants won't become problems themselves.

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3/4 to 1 1/4 ac pond LMB, SMB, PS, BG, RES, CC, YP, Bardello BG, (RBT & Blue Tilapia - seasonal).