Whether your garden is an ebb and flow, top-feed drip, aeroponic, nutrient film technique (NFT), or deep water culture (DWC) system, maintaining your reservoir temperature is crucial for getting the best results. Your plants will benefit most by maintaining a consistent temperature of 60-70ºF. Large fluctuations in water temperature can cause stunted growth and lower yields. Temperatures that are too high will most likely lead to pythium or other unwanted root pathogens. Temperatures that are too cold will lead to decreased nutrient uptake.