bc, obviously you didn't make it stoney creek web site. their PA 50 Gast rotary vane compressor kit with 2 membrane diffuser's , control valves, 200' feet of poly tubing is only 600 plus i think about 60 for shipping. the best kit around for the $. more than enough for your needs. i used 3/8" 20' rebar to weigh it down , make sure to over lap the rebar joints buy ' or so and connect the rebar to diffuer plate , so you don't break the fitting. put some bricks on the plate also. put diffuer in boat and use the rebar to push you out and drop it in , with a rope and float.
