mars hydro ••similar to••mars hydro m6 grow tent fan, 10 speeds powerful oscillating clip fan with low noise for hydroponic plants and ventilation circulation with convenient app/wifi control 1pc. is up for auction in Patio, Lawn & Garden. The current bid is $2.50, 94% below the $39.99 MSRP, in Good Condition. This auction has ended — similar items appear in live auctions regularly.