Sorry, I’ll be more precise, illuminate clarity and eliminate confusion.
I really like prevention too, it’s so much cheaper and far more productive in the long haul, crop after crop, year after year. When you grow and sell buds on a commercial scale quality, quantity in pounds, the shortest growing time is the money maker. Need real healthy plants and microbes to do that. Six great harvest per year puts more money in your pocket than 3 minimal harvest per year. You do the math, Growing for highest quality and maximum quantity buds certainly trumps gorilla farming in a National Forrest and growing Mexican Dirt Weed in the back yard for volume like back in the 1950’s and early 60’s.
Sure, that's a no brainer
Provides 90% supplemental oxygenation and 10% supplemental CO2. Air pumps regardless of the volume of air you pump provides only 20% oxygen and 80% nitrogen – the difference is clear to me, 20% O2 vs. 90% O2.
Ehhhh, DO in water is according to below chart.....injecting higher concentrations of O2 is not gonna do didly squat
The tab is only 1 way to supplement oxygen and CO2, there are many others ways that are more cost effective methods to administer supplemental oxygen.
So why mention them?
Great question. Some say yes, others don’t use CO2 at all… what’s your opinion, your experience? 10% CO2 off gases and equilibrated with ambient CO2 (0.038%) around root balls and the plant itself like smoke rising from a fire.
The trouble with that reasoning is that CO2 is heavier than air, so it will stay in root ball, and anyways the minuscule amount of CO2 provided by a tab.......and no, I don't believe that plants absorb CO2 through the roots. All this some say, provide some peer reviewed scientific papers and I'll change my mind.....lol
I know you have no experience with RDWC/DWC growing and clearly no knowledge of oxygen-rich air spaces >24% oxygen. Why in the world would anyone want to supersaturate any grow room air space with oxygen? An oxygen enriched room with all that electricity running would be a terrible fire hazard, NO SMOKING signs on the door would be a city Fire Marshall requirement (code) like hospital rooms using oxygen. Much less oxygen is required to insure continuous 100% DO saturation in nutrient water. Of course DO supersaturation in the reservoir and outflow to the return flow at the pump intake prevents all low oxygen failures 24/7. Plenty of dissolved to satisfy the BOD for the plants, microbial eco systems and off-gasses oxygen by simple diffusion into the atmosphere – DO never falls below saturation at any point in the circulation system even at 80F nutrient temp. Plenty of oxygen for plants and beneficial microbes with higher metabolic rates. Aerobes grow faster in warmer conditions and are healthier provided the BOD is continuously met.
There is no such thing as supersaturation in gas form, i.e. in air........supersaturation can only occur in liquids, and under very special circumstance that I'll claim never occurs in a reservoir, so saturation is saturation according to the chart, suggest you read the links I have previously posted. I have plenty experience with oxygen rich and poor air spaces, and other gases as well, from controlled atmosphere shipments/storage of fruits to gas freeing of oil/gas tankers to scuba diving, and quite frankly what you say makes no sense.
Oxygen enrichment with Supplemental oxygen > 23% or greater adjusted to insure continuous 100% DO supersaturation or better, DO supersaturation and never allowing the DO to plummet below 100% DO saturation throughout the growing period…. DO saturation adjusted and confirmed with daily serial DO Saturation testing. That simple. And this is very cost effective compared to the cost of firefighting fungal outbreaks year after year, decade after decades for the rest of your pot growing life.
I have no clue......
Doctors, fish farmers, fish hatcheries and astronauts use, test and adjust supplemental oxygen administration every day – this is as common as dirt. They also understand that minimal safe oxygenation is extremely limited using air, an electric fan and hypothermia.
Sure they do, just as well as I do before I enter a previously inert void space on an oil tanker, it's a question of living to tell the tale.
I really like the Current Culture engineering and design with continuous water circulation (contained water circulation), configuration, pots, lids, etc., but the Current Culture Brand is expensive. Mine is homemade using the Current Culture model and a smaller circulating water pump to conserve electricity, reduce pump heat and reduce pump noise. Large water pumps pumping all the water is not necessary. Factory controlled climate air, temp and humidity and of course supplement oxygen enrichment efficiently dissolved into the reservoir nutrient with a homemade packed column maintains continuous great DO's - 125% DO sat @ res outflow and 110% DO sat at res inflow, that’s all… all problems associated with RDWC low oxygenation are gone -- forever.
Wots .....Factory controlled climate air, temp and humidity........and where do you get this "extra" O2 from, a high pressure large bottle with pressure reduction valves?
Instead of a water pump, why not use an airlift for circulation, plenty cheaper to run and aeration at the same time to boot.
Most growers are bright folks and they clearly choose firefighting over prevention. Let’ clarify and redirect here Corgy. RDWC/DWC pot growers love their water chillers, chiller salesmen love to sell them by the train loads and growers really believe that if their nutrient temp is 65F -70F, the DO sat chart always says the DO saturation will be 100% DO saturated (the DO sat chart is based on air exposure 20.93% O2, not oxygen enriched O2 concentration >24% O2). All RDWC/DWC pot growers and water chiller salesmen say that the magic DO sat that prevents and inhibits Pythium fungal outbreaks is 100% DO sat. OK, 100% DO sat prevents fungal outbreaks, that sounds reasonable to me. So then it sounds logical to me and the average hydroponics grower that air and chilled water (65F-70F) insures 100% DO sat continuously 24/7 and the low oxygen opportunity fungal outbreaks thrive in will be prevented – right? So buy a $250 water chiller, turn it on and hope your don’t have an outbreak, looks and sounds familiar. The salesman shows you the DO Sat chart and insures you that 100% DO Sat at 68F is guaranteed (read the DO sat chart) and the grower is sold hook-line-and-sinker. Sales says cold water is your best option. No one argues with the proof written on the DO Sat chart. But, very few growers ever heard of a DO Meter much less ever tested the DO saturation in their chilled nutrient water to actually see just how low their DO sat really is in their aerated solution. The actual DO test results are often very different that the DO Sat chart numbers show. The DO sat chart never considers the amount of oxygen consumed (lost from solution) because of the collective BOD for sustaining 2 eco-systems nor natural off-gassing as the nutrient water circulates through the hydro-system.
Again, no clue......and the DO chart doesn't have to consider anything, it's just a chart showing scientific facts. There's no off gassing of O2 from water, if there was, it's highly unlikely the worlds aquarium and aquaculture players would condone aeration.......
Buy a chiller and chill your water 24/7, but there is no guarantee from the manufacturer or chiller salesman that the chilled water will insure 100% DO saturation nor prevent low oxygen crisis or root rot outbreaks. Why not? That’s a no-brainer.
If operated correctly and run 24/7 there will be 100% DO according to the chart.
The water chiller business is thriving and treating root rot is thriving and a very popular topic year after year after year.
***Gorgy, you have no RDWC/DWC experience, but in your opinion… why isn’t fungal outbreak prevention working using plenty of air and cold, chilled nutrient solution?
Because it is only prevention, and prevention doesn't always work if the parameters move outside the safe zone even briefly, and the fungi get a foot hold.........then firefighting kick in!
.....and I have plenty experience with aquaculture which is a whole other ballgame when it comes to a life sustaining water environment.
Reason I have no experience with DWC is simply because I refuse to get a water chiller due to the power consumption which is major headache and threat to living quietly and stealthily. I can't keep the floor temperature in my grow rooms cold enough by ventilation alone.
