lkbird 4-in-1 smart hydroponic monitor, digital ph meter for water & tds meter, real-time ph ec tds temp monitoring, accurate water ph tester for hydroponics, dwc, aquaponics & indoor plants. (yellow) is up for auction in Patio, Lawn & Garden. The current bid is $1.00, 96% below the $27.99 MSRP, in As Is condition. This auction has ended — similar items appear in live auctions regularly.