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If you don’t test PH, there’s no point in growing. This is the best price for a tester and it works like clockwork. Thank you Vivosun for another quality product! Shipping took two days and I ordered Saturday!
What a deal for both, the average price is roughly $20 each so getting both plus free shipping for the price made this a no brainer. As for accuracy, I am not 100% but it takes quick readings of my water and gives me a good idea of what is going on.
These work great and are working great after a year. I wish the backlighting on the PH pen last longer and I wish the TDS pen had backlighting. No backlighting makes it difficult to read in poor light areas or in shadows.