I agree about finding out how deep it is, and the average depth. Ponds that have a lot of area where the sunlight can reach the bottom can grow a lot of weeds and algae.

You can put in a siphon drain, no need to dig up the old stand pipe.

6 acres is a lot of water to take care of if there are problems that the wife doesn't like if they crop up in the first summer you own it.

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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).