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.
disrupt86 Reviewed by disrupt86 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