LaMotte sells test kits for less than $50 if you want to go less expensive.
Richmond Mill Lake just bought a YSI DO200 for something like $250, complete with probe. Be sure to specify Fahrenheit instead of Centigrade for the thermometer. I don't remember where the bought it but it was a good deal and they are pleased with it.


Teach a man to grow fish...
He can teach to catch fish...