Dissolved oxygen

you can't remove airstones from the game, I'm sorry. Try to buy a bigger air pump and dimmer it to 50%, I did in this way with an Hailea 9610, works fine and isn't too noise (ps. keep the air pump in the tent to reduce noise)

I was also interested in O2 emitters but i gonna wraith more time..

always always always use air stones. if you add hydrogen perioxide to the water. I don't remember if its 2tsp or 2tbsp per gallon but you can find that online and can help with your rot issues. That saved my last grow.

Now it is just airstones in my two buckets. O2 grow ( electrolysis) isnt for me i think. I thought i would get faster growth and bigger buds, and didnt know it acually can get to much oxygen. Water temp is allways 68˚F. Electrolysis dont impact water temp like airstones. I allways drain all water once a week and refill with new mix of nutrients. Lets say every monday i mix new solution, and every thursday i have to add water to get the level of approx 1,5 inch under my netpot. I use pebbles in my net pot. I got a dissolved oxygen tool from milwaukee so i can measure my oxygen level all the time. With airstones i cant get more than 7,5mg/L. Its not my first time dwc but first time with electrolysis. Never ever had any problems before. I saw commercial on youtube for o2 grow thats why i had to try it 😅 thank you for your answers! Please follow my strawberry kush grow, and soon another diary.

The maximum saturation level of dissolved oxygen in 70f (21c) water is approximately 9 ppm. The ideal nutrient temperature for adequate oxygen in the solution and healthy nutrient uptake is 68-72f (20-22c) if the solution is too cold it reduces the water/nutrient uptake by plants. "An upper limit for elevated root zone dissolved oxygen concentration for tomato reported very little (minor) growth benefit was achieved in tomato when dissolved oxygen was elevated from 8.5 ppm to 30 ppm." "Two weeks from the start of the experiment, roots in the 40 mg L−1 treatment exhibited stunted growth, became thicker, and had fewer side and fine roots compared to roots in the lower levels of DO treatment. Almost all the measured growth parameters (fresh and dry weights of root, stem, and leaf, leaf area, stem diameter) were significantly reduced in plants grown in the 40 mg L−1." https://www.sciencedirect.com/science/article/abs/pii/S0304423807001203

and yes... if electrolysis is occuring outside the tablet... then you'd be oxidizing molecules which 'could' have a significant impact ... or not... i'm not a chemist. also, if it makes the water warmer, that would be a problem for microbial growth.

gas dissolves almost immediately into solution. bubbles or agitation will do it very easily. Larger volumes you want a vortex/agitation - is more efficient at the job. in a bucket, bubbles are fine. they stir as much as provide o2. now, you can go above carrying capacity but at that point you are also releasing that o2 as fast as it is released from those tablets into the air == the resulting equilibrium of the rates of added/lost per second. if these tablets are causing a problem, i'd re-assess your perception of the benefit they provide... it is likely small if any, where as causing problems with a grow are severe and significant. the extra o2 likely has no impact on the overall growth vs using airstones. I'd stop using them if you think they are the cause of teh root rot. now, was temperature of water warm? this would also be a likely culprit... how long before refill? the longer between refills the more risk there is. I'd even drain and refill with fresh water when the time comes... with any smell or other noticeable concern. A good fluffy substrate will help root development infinitely more than the difference between airstones or "o2 grow" -- 50/50 soil/sphagnum peat to perlite or 70/30 coco to perlite (perlite can be substituted with a multitude of things, but for ease of writing just using "perlite" generically)

I really want to use o2 grow instead of pump and airstones if possible. Pump makes noise 😅

My bad, my question is about electolysis from o2 grow combined with nutrients. I solved root problem with hydrogenperoksid. Took me 3 days before it was fine again. Went back to airstones instead of electrolysis (o2 grow). First time trying with electrolysis, and thought it couldent get to much oxygen in water. Had it on for half an hour every four hour so mg/l wasnt 13 all the time, but fluxing from 7 to 13

I'm not too sure what your question is but I do have experience with DWC and dissolved oxygen. As well as root rot... As long as your pump is strong enough for your reservoir you don't have anything to worry about. Also a nice safe guard against root rot is hydrogen peroxide, which also increases oxygen levels in your reservoir. Just don't over do it. About 15ml for a 5 gallon reservoir is good and works wonders.

If too much oxygen is added to the solution it can cause root stunting.

With o2 grow i had 13mg/L oxygen, should be better than 7,5 with airstones.

Healthy water should generally have dissolved oxygen concentrations above 6.5-8 mg/L and between about 80-120 %. Water temps should be 63-66F