If they are like the cubes that I am familiar with, they are about 2" square. I use them to help feed Triploid Grass Carp when I have them in a holding tank.

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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).