So here's a quick run down of who's who....when it comes to looking for Compost Tea Sprayers: Compostwerks....sells Gregson-Clark Sprayers.....so I talked to GC and getting more info on their sprayer. They use diaphragm pump. Turbo Technologies (has their website called CompostTeaSprayers.com) that sells their version of compost tea sprayers. They use centrifugal pump....but oversize their pipes so it won't harm the microorganisms. They also have a remote for their boom-less sprayer. And bypass valve to aerate the tea. Green Pro Solutions, are very high priced....great equipment....but I think they are more for large box truck mounted set ups. King Sprayers.....I don't know much....but they use aluminum frame for mounting their sprayer and equipment. Looks nice. They use a diaphragm pump. GEOTea Sprayers....waiting to get more information. I think they use a diaphragm pump. I'm looking for 100 gallon tank. Boom-less with two nozzles for the rear on the Pro Gator. I would like a electric valve switch to be able to turn on and off the boom-less nozzles. I would like to aerate the tea when in the tank...plus I think it would make clean much easier too. And it also needs to have a hose reel too (200 feet). I will carry an extra tank inside the enclosed trailer for extra tea (when needed) and 35 gallons of clean water to wash out the tank and hose line. Does anyone have any experience with any of these companies or know another good skid spraying company? I am trying to decide who to go with. Thanks for any and all info.!!!!!!