Burg, the model is Gast 1/4HP, Rocking Piston, producing 1.5 CFM of air, 115 V, and 3.1 Amps. Ill have to head out to the unit to se eif there is a specific model, the folks i bought it from suggested I put a bottom displacer shield under the difussor,to alleviate the sediment being carried by the upward current.

Ill put together a Sechi Disk of some sort, i use several rocks that are slightly covered by water as my indicators so far but your right, Ill get an official reading on visability. I also do know that even though the water looks muddy, it is all agea sediment that is stirred up, I can let it settle in a glass and it clears up and then you can see the greenish tinge to it.

Ill see if I can get some pics, bear with me the boss has me sealing our huge driveway today and tomorrow since its the first "3 days of no rain" window we have had here in the last 8 weeks.

Thanks for the input.....

Mark ( Salmonid)

Have fish..Will Travel
Mark Blauvelt - Dayton Ohio
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.75 acre pond, HSB,YP,CC,BC,BCF,BG,HBG,RES