http://www.amazon.com/Milwaukee-Instruments-pH600AQ-Tester-Calibration/dp/B005H78ZI0/ref=sr_1_1?ie=UTF8&qid=1348446610&sr=8-1&keywords=ph+meter
http://www.amazon.com/General-Hydroponics-GH1514-Control-Kit/dp/B000BNKWZY/ref=pd_sim_indust_3
this will be all you need for now they even have 15 dolla water testers
http://www.amazon.com/General-Hydroponics-GH1514-Control-Kit/dp/B000BNKWZY/ref=pd_sim_indust_3
this will be all you need for now they even have 15 dolla water testers