I need a lead on some flexible submersible cable. We've been asked to complete a aeration setup at an office complex that the lake and pond guys disappeared from. The aeration motor specs call for a #6/3 cable from the starter/contactor to the floating motor platforms for a 300 ft run. The pond guys have #12 SJ** extension cord running to the aeration motors (at 280 ft), and the owner can't understand why it keeps burning up starters and tripping breakers.

So far, the supply houses have come up with a blank, and my seaching the net hasn't been very productive either.

Any help?