How to use: It's that simple - just water them thoroughly and let the excess water drain! Eazy Plug will regulate the optimal humidity automatically. Features: Plug dimensions: 3.5 x 3.5 x 3.0 cm Tray dimensions: 28.5 x 19.0 x 3.0 cm EC: 1 mS/cm pH: 5.9 Advantages of Eazy Plug: self-regulating easy to use air pruning to significantly increase root mass suitable for gradually drier cultivation Compatibility: Eazy Plugs are compatible with all known growing media, such as rock wool, coconut substrate, black and white peat, garden soil, potting soil, soilless growing, fine bark and wood mulch, wood fibers, perlite, pumice, sand, clay and vermiculite. Application: Eazy Plug can be used in hydroponic irrigation systems such as Ebb & Flow, drip irrigation, NFT *, wick systems, floating platforms, DWC *, aquaponic systems, soil cultivation (indoor and outdoor). Humidification time: when pouring from above < 10 seconds when immersed < 10 seconds drip irrigation - depends on the preset amount when watering from below < 45 seconds