The first few pics look like Eurasian Water Milfoil. But, Pic 10 looks like a few different plant species in it.

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[Linked Image from lh6.ggpht.com]
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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).