Quote Originally Posted by disrupt86
the hanna primo is 20 bucks and works great,theres also oakton. ,blue lab industries,milwaukee,hm digital. lots of companies all in all they do the same thing.if u do go with the hanna primo remeber its not water proof.
Are there any good ones in the 30-80$ range? Whats the benefit of waterproof?

Any links would be great.
DigitalCoast Reviewed by DigitalCoast on . PPM meter? Hey all, Great info on this forum and some amazing grows! I have a question about a PPM meter. Currently and on my last grow I had some problems with yellowing leaves, Im assuming its either nute burn, cal mag def problems. I am looking to get a PPM meter and dont know which route to go. Any suggestions on which work the best for the money? I cant spend too much I just bought a 600W Galaxy. Rating: 5