Welcome to Pond Boss, bawplank.
Good thing you caught these scumbags.
Start with any receipts you have from purchase of any fish in your pond. If you don't have the receipts, call back to where you bought them and see if they can dig it up for you. If they can't find it, just ask what their unit price and delivery charges were back in the year you bought them.
Then, take an estimate of how much feed you buy each year, and include that total.
Put the cost of the fish feeder and maintenance in there too. Those bluegill might not have been 9-10" if you hadn't fed them.
Also, take a value of your own time such as an hourly rate. Then total the time you've spent raising these fish, and multiply hours times the rate and include that total.
Do whatever you can to get the dollar amount as high as possible, AS LONG AS YOU CAN JUSTIFY IT. Write it all down.
If you aerate, the cost of the aerator and the electricity should be included.
Water testing time, if you do that, should be included.
More folks will chime in. Please keep us posted. I can tell you, most folks here will get sick to the stomach after reading about the theft of your fish.
