Did the HH Shrub have the 1/2 cinderblock in the base? it might slowly poke the "branches" int o the pond bottom and slowly get closer and closer to the pond bottom. If you have a boat, you can rig up a grapple hook and roll it over, or just go swimming and do that while in the water.

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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).