Boondoggle, #4 is supposed to be floating. The last bag that I got is about 25% slow sinking. I have found that it varies from production run to production run. If you want a sinking feed, the smaller sizes are sinking. (1, 2, 3)

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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).