Jeff, compare the joules rating on the solar chargers. You want the highest rating that is possible. The grid based charger that I linked to above has a rating of 9.0 Joules. It says that it also works in areas of moderate to heavy vegetation.

www.hoosierpondpros.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).