just some examples....

Sunleaves Soil pH Tester - Worm's Way
Sunleaves Soil pH Tester - Worm's


Electronic Soil Tester - Worm's Way
Electronic Soil Tester - Worm's Way

dont know how well they work...but there are cheap ones out there
maybe get a pen and the cheap probe( i think thats what im going to do next grow)
hanayama Reviewed by hanayama on . good brand of digital pH testers I know i have heard from stinky somewhere that Hanna's meters are of low quality so what are the good brands? and Stinky which meter do you use? Rating: 5