You can find the TDS3 on the 'bay for under $20 shipped. Work fine. Have bought them for gifts they're so cheap. :thumbsup:
DreadedHermie Reviewed by DreadedHermie 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