I figured I better start out as cheaply as I could..so stepped up from the fish tank charts to these...they sure make a difference in your grow...do a search on Pen Type PH/TDS meters...TDS meter $22.95..PH meter was about the same or close I do believe...

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Treetops
Treetops Reviewed by Treetops on . Digital PH tester what should i get? Looking to get a digital ph tester the pen style and would like something waterproof and something that will last for a while for a good price. does anyone have any suggestions on what to get or where to get? would also like to know what to stay away from. Rating: 5