While adding hydrogen peroxide to your water will kill most bacteria and pathogens, including the ones that cause root rot, it is only effective in your system for a day or so or since the H2O2 is quickly converted to oxygen and water. Therefore, if you use hydrogen peroxide as a treatment for root rot, you will need to treat your water daily to prevent re-occurrences until you actually fix the problem that is causing your root rot in the first place. I have used commercial grade H2O2 against root rot more than once, and I never saw any noticeable difference, so I would NOT RECOMMEND H202 as any type of long term cure! H2O2 is only temporarily effective at best when it comes to getting rid of root rot.
It makes me so sad when people tell growers to use H2O2 (hydrogen peroxide) to kill root rot because I know they will continue to struggle with it. Even the commercial grade stuff just doesn’t work most of the time (and I’ve tried)! All H2O2 does is cause bubbling near the dead brown roots (or any organic matter), which is why I think people believe it’s helping. In my experience, it doesn’t help the plants themselves (they don’t look any better), and what’s worse, all the H2O2 will be completely gone from the water within 24 hours. H2O2 kills most of the bacteria in the reservoir, including any good bacteria you’ve added, and does nothing to address the underlying problem. You can’t sterilize away root rot, it attacks people everywhere! Although H2O2 does kill bad organisms, it leaves enough of it there to repopulate your reservoir. I personally recommend Botanicare Hydroguard (the newer, improved version of Botanicare’s popular “Aquashield” root supplement) for marijuana root problems because I’ve used it successfully to get rid of more than once case of Root Rot (and by ‘successful’ I mean new white roots exploded out of the old mushy brown ones and I was able to eventually harvest the buds – look at the pics below). Hydroguard (and their old supplement Aquashield) are also much cheaper than most other similar root treatments, and in my experience more effective. Take a look at what happens with the roots from using a supplement like Hydroguard.
What you are looking for is new healthy white roots growing out of the old brown roots. Eventually, as the root ball gets bigger, you will no longer be able to see the old brown roots. After you start noticing a recovery, some growers will snip off old dead roots, but I often don’t. Roots are beginning to recover … Notice the new white roots growing out of the old brown dead ones within just a day or two of receiving Hydroguard in the reservoir. By this point, the plant has stopped showing any new symptoms and appears to be growing normally. Roots are now mostly recovered below … Notice that you can barely see any signs of the old brown, and all the new roots generally appear white and healthy. The plants on top are lush, healthy, and fast-growing, though the old burnt leaves never recovered. In addition to treating root rot, I like to use Hydroguard or as a preventative. It is surprisingly effective even in warm reservoirs. Hydroguard have definitely gotten me through a hot summer before. Since I first started using Hydroguard in DWC, bubbleponics, and other hydroponics, it has successfully prevented me from getting root rot as long as I keep using it. I also use it when growing in soil if I suspect root problems. Head shops, stores that sell items like rolling papers and pipes as well as tapestries, incense, magazines and other items of interest to members of the cannabis community and other subcultures, are nothing new. A head shop is no longer a seedy joint with a poor reputation for selling drug paraphernalia and slinging weed out the back door. With the changing marijuana laws in North America, the cannabis industry is expected to reach over $20 billion by 2021, so there has never been a better time to join the industry. Selling marijuana for recreational use is still illegal on the federal level. Each state has its own laws and regulations for marijuana, and these laws are continually evolving. Research this thoroughly in your state to get an idea not only of what the laws are now, but any changes expected to be coming down the pike. As of early 2019, 10 states have legalized cannabis for recreational use, and all but three states have a medical marijuana program in some form. For instance, in Colorado weed is essentially treated as alcohol historically has been – you must be over 21 to purchase and partake. Louisiana has legal medical marijuana, but it isn’t legal recreationally and still other states like Iowa and Alabama maintain very harsh laws. Not only do you need to have an eye on marijuana possession laws, but those for head shops and dispensaries who serve consumers. Even possessing and selling items used to consume cannabis, known collectively as "paraphernalia," can lead to criminal charges and penalties.
There are plenty of online resources that are able to acquaint you with the most up-to-date information about the legality of marijuana in your state or you can always consult a lawyer. Of course, you need to contact the local and state government to make sure you adhere to all regulations just like any other business would. Head shops should be located on a main thoroughfare in the community you wish to serve. A small spot of several hundred square feet will do nicely to start. Make sure your location is commercially zoned and is centrally located close to colleges or other areas that feed pedestrian traffic.
Be far enough away from any other head shop to prevent too much direct competition – ideally, nothing within a 20-minute walk from your place. You will need several thousand dollars to set up your head shop with inventory. Offer a wide array of smoking devices, hemp products, books and other media related to marijuana.