The PH meter I purchased got sent back. After two point calibration 4 and 7, I tested some fresh 7 solution and got a reading of 8.1. Recalibrated and the second test on a fresh sample of 7 gave me a reading of 7.8. If it's a yellow cheap meter don't waste your time or money!!!

The Jack's Classic Bloom Booster and 420 scope I ordered arrived. The Jack's is blue like MG. WTF???