Root rot is a major problem in cannabis cultivation, especially hydroponic grow systems, but you can avoid this issue by watching for signs early.  If you notice your plants drooping, growing slowly or not at all, or showing nutrient problems even though you’re using a good quality nutrient, the problem may be root rot. If you’re using hydroponics system, you can easily check the health of your roots. If they are white and dense, they're healthy. If they are brown, slimy, thin or mushy, then you are experiencing root rot. Harmful microorganisms such as pythium and phytophthora thrive on hydroponics nutrients, dirty water, light, and water temperatures that are less than optimal. They can suck the life out of your roots within a few days, and checking your roots regularly can help to catch them before they become a major issue. If you are experiencing root rot, you can stop it using the following methods: Early detection - Monitor the health of your plants regularly above ground and if you are using a hydroponic system, visually check the roots often. Reverse osmosic water - Running your water through a reverse osmosis filter will help by removing unwanted materials in the water that may be causing the issue. pH Control- Make sure to test your water or soil pH often to maintain a healthy pH between 5.2-6.3. If they test high or low, you will want to adjust it using calibrating solutions.Overwatering - Make sure not to overwater. Ensure that your soil nearly dry before your wanter your plants again. If you suspect you may be overwatering, allow your soil to dry completely before adding any more water. Water temperature - Keep your root zone and water in a temp. range of 19.44°C - 21.67°C.Beneficial Microbes - There are many protective solutions that provide beneficial microbes to help your roots defend against harmful organisms  as well as promote growth, yield, and general plant health. Hydroponic Enzymes -  Hydroponic enzyme products such as SensiZym digest root-shedding debris and other harmful materials in the root zone. This helps with nutrient uptake and protects against harmful organisms.Aeration - Roots need oxygen to grow healthy, so installing an aeration device in your nutrient reservoir can help keep your root zone oxygenated. If you're growing in soil, make sure it has perlite or other spacers that loosen soil and prevent it from getting waterlogged. Many commercial soil products lack sufficient aeration.Light Lock - Make sure to keep all light out of your root zone. Cleanliness - Make sure to keep your grow room, irrigation system and plant containers as clean as possible to prevent unwanted bacteria from entering your grow system. JUMP TO ROOT ENHANCERS