Some growers (myself included) have tried Great White without seeing any root rot recovery. However, other growers have had great results with this supplement! For example, in our growing forum, just like Hydroguard, some hydroponic growers have been able to cure their root rot simply by adding Great White to their reservoir. It all depends on exactly which organism is growing in your tank! What was growing in mine might not be the same as what’s growing in yours, so when it comes to “good bacteria” supplements it can’t hurt to try more than one if the first one doesn’t work.
A small sample of Great White doesn’t cost much, so if you’re still struggling with root rot after trying everything else, it’s worth giving it a try to see if it works for you! As I mentioned, it is incredibly beneficial to try to get as much oxygen as possible dissolved in your water. Therefore, it’s a good idea to buy a medium sized air pump and big air stones for your hydroponic system. Up to a point, the more bubbles and surface agitation, the better, as this dissolves more oxygen into the water. As long as the roots are not being very disturbed, you can’t really go wrong with adding more oxygen. Root rot cannot thrive in an oxygen-rich environment and your plants will grow faster with lots of oxygen. I use one EcoPlus 2 Air Pump w/ 2 Outlets for each 10 gallon container (which each hold 5 gallons of water), which I have connected to 2 large air stones per air pump since this one has 2 outlets; this helps make sure there’s plenty of oxygen in the water healthy roots and faster growth.
You need 3/16-inch standard aquarium tubing to hook everything together. Try to get tubing in black if possible, to ensure light can’t get through. This has worked great for me – I haven’t had root rot since I started using this air pump/air stone combination with Hydroguard. But lots of different pumps and types of air stones will work great – the important thing is to make sure that you’re seeing lots of bubbles! Your roots don’t like light, which is reason enough, but the bad organisms that attack cannabis roots love the heat and light they receive from your grow lights! Therefore, hydro growers want it to be completely pitch black in their DWC reservoirs. You should not be able to see even a tiny bit of light where your roots are! You don’t need to worry as much about repairing light leaks when using a dark, thick and sturdy tub as your water reservoir. Help block light and heat from the reservoir with a simple towel! In order to accomplish a totally dark reservoir for your marijuana plants, here are some things to keep in mind! Consider the Material & Thickness of the Reservoir Tub – Darker and thicker material will let less light through to the reservoir. Consider Reflectivity – Pale colors tend to reflect back more light and heat, but you can always increase the reflectivity later by covering the lid with a reflective material! You may need to get down low and look up to see them! Use Opaque Tape to Cover Any Light Leaks – Electrical tape and reflective tape are great options for covering up places where light is getting through. Use Dark (Light-Proof) Tubing – Another way to protect the water from light exposure Light-Proof Your Net Pots. Neoprene net pot inserts are great to fill in the net pot instead of using clay pebbles, and won’t let any light get through. All the Hydroguard, Great White, SM-90, H2O2 or other root supplements in the world often won’t solve a root rot problem if there’s a light leak! Lower the temperature of the grow space under 80°F, and even better under 75°F. This also lowers the temperature of the water in your reservoir. Water can’t hold much dissolved oxygen at higher temperatures and your plants need oxygen to “breathe.” Getting more oxygen to the roots not only helps fight root rot, it makes your plants grow much faster. If it’s too hot in the grow space, you’re much more likely to run into root rot as well as overall droopiness. In an ideal world, the maximum recommended temperature for the water in your reservoir is around 72°F (22°C) and some growers will go to great lengths to keep their reservoirs very cool. However, when using a great supplement like Hydroguard that fights root pathogens directly, you can often keep the temperature quite a few degrees higher without as a problem. Cannabis plants like about the same temperature as humans do!
5.) Avoid Disturbing Roots, Especially Young Plants. When it comes to nutrients and plant growth in a hydroponic setup, it’s important to watch over your roots and change your reservoir water regularly. This is especially important in the flowering stage when the plant is very sensitive to nutrients and pH. Regularly changing your water every 7-10 days will help your plants get better access to nutrients, and help prevent deficiencies and toxicities. However , when your young seedling or clone is first getting established in your hydroponic system, it doesn’t have an established a colony of good bacteria around the roots, and has not yet grown a biofilm that protects the roots against pathogens. During this initial period, a full reservoir change can throw everything off balance, and your roots have to sort of “start over” from the beginning. That’s why if you historically struggle with root rot, it’s recommended for the first 3-4 weeks of your cannabis plant’s life to only top off the reservoir with additional nutrient water, and hold off on a full reservoir change until your plants have grown lots of roots with a healthy layer of biofilm over all the roots and sides/bottoms of the tank. In a hydroponic system, make sure that any dead roots, dead leaves or other types of plant debris doesn’t get into the reservoir because they will provide a breeding ground for bad bacteria as they start rotting. If you do notice organic matter in the reservoir, fish it out as soon as possible. You also want to keep your grow area as clean as possible at all times to stop bacteria before it starts.
Before you begin your grow, it’s a great idea to clean all grow-related items to kill any bacteria or fungus.