fartoblue
Well-Known Member
What is eod and e3d mate I am lost?
Pool Shock Calcium Hypochlorite 65% Question
- Thread starter fartoblue
- Start date
Wastei
Well-Known Member
Every other day and every third day
fartoblue
Well-Known Member
This is an interesting thread https://www.rollitup.org/t/how-to-operate-a-sterile-hydroponic-system.849475/page-6
A poster called Rahz said
This all started for me when I noticed 20 ppm hypochlorite in a nutrient solution wouldn't phase the rot, however 5 ppm in plain water would turn dark brown rot light tan within several hours. It seemed like the nutrient solution was affecting the ability of the bleach to sterilize so I started doing some research
He also said
The dosage recommendation for Pythoff (chloramine based) at the labels listed gauranteed analysis comes out to 29 ppm. Conventional wisdom suggests 4 ppm hypochlorite keeps water sterile, which suggests chloramine is 7x weaker than hypochlorite.
The main point is that if you add bleach to a nitrogen solution, there's not going to be any hypochlorite in the solution. It get's converted into chloramine within minutes. Chloramine sterilizes just fine, but if you're dosing based on 4 ppm hypochlorite you end up with around 4 ppm chloramine which probably isn't going to offer any protection. That is also a guess based on product lables, but I think it's worth looking into.
fartoblue said Maybe it would be a good idea to flush the plants with the tap water and CH before adding the nutrients.
A poster called Rahz said
This all started for me when I noticed 20 ppm hypochlorite in a nutrient solution wouldn't phase the rot, however 5 ppm in plain water would turn dark brown rot light tan within several hours. It seemed like the nutrient solution was affecting the ability of the bleach to sterilize so I started doing some research
He also said
The dosage recommendation for Pythoff (chloramine based) at the labels listed gauranteed analysis comes out to 29 ppm. Conventional wisdom suggests 4 ppm hypochlorite keeps water sterile, which suggests chloramine is 7x weaker than hypochlorite.
The main point is that if you add bleach to a nitrogen solution, there's not going to be any hypochlorite in the solution. It get's converted into chloramine within minutes. Chloramine sterilizes just fine, but if you're dosing based on 4 ppm hypochlorite you end up with around 4 ppm chloramine which probably isn't going to offer any protection. That is also a guess based on product lables, but I think it's worth looking into.
fartoblue said Maybe it would be a good idea to flush the plants with the tap water and CH before adding the nutrients.
Wastei
Well-Known Member
I recently had pythium issue when transplanting from a small DWC cloner which hadn't been amended with pool shock. My current grow is at my friends place. I'm only there for one or two days a week. He missed dosing with chlorine. Brown tan roots to begin with, smelled like rotten carrots. Took about 2 weeks with 1-2ppm residual for them to become pristine white all over again.
I also used Polysorbate 20 in combination to do this, but just for the first 4 initial days. Results speak for themselves really. Practical knowledge beats theoretical all days of the week.
I also used Polysorbate 20 in combination to do this, but just for the first 4 initial days. Results speak for themselves really. Practical knowledge beats theoretical all days of the week.
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fartoblue
Well-Known Member
I always thought polysorbate was an emulsifier used in cosmetics. Did you use it as a wetting agent?
Wastei
Well-Known Member
Your not wrong! It's used in everything from food to cosmetics and cleaning products. I use it as surfactant and cleaning agent, it's really effective at combating Pythium. I use it as surfactant in foliar spray.
I also clean my system between runs with it. It a little tricky to work with though!
fartoblue
Well-Known Member
Well I have drained the res again today to test it. Tapwater and Calcium Hypochlorite at 0.75 grams per 100 litres show up as 0.4 - 0.5 ppm on a test strip so I flushed the plants with this solution. As soon as I added nutrients nothing showed on the strip, so the nutrients obviously change or neutralize the CH. I will water the plants tomorrow with the CH nutrient mix.
I don't want to just keep adding more CH. If it is the Nitrogen that is changing the Chlorite I worry what is happening to the Nitrogen as a result.
I believe the chlorite may be changing to Chloramine which is what I think Pythoff contains.
I don't want to just keep adding more CH. If it is the Nitrogen that is changing the Chlorite I worry what is happening to the Nitrogen as a result.
I believe the chlorite may be changing to Chloramine which is what I think Pythoff contains.
Wastei
Well-Known Member
I think it has more to do with how the nutrient solution react with the strip. It's intended for pools etc. Do whatever you like. People has been using sodium and calcium hypochlorite successfully for years, including me! Good luck!
Impregnant
Active Member
Sorry to be late on this but, did you found out what happened exactlr @fartoblue ?