Sunleaves makes a great TDS meter that is like $35. I've had mine for two years and it has yet to fail me. I would say the only downside is that its hard to calibrate right on 1000 PPM, so its usually off by like 20 which is pretty trivial. Also I am not sure if its waterproof, I've never dropped mine into the water.
dejayou30 Reviewed by dejayou30 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