Using food grade H202 (35%) in hydro reservoir

I've been having issues recently with my holding reservoir (32 gallons) going rancid in just a matter of days recently. What I mean by that is there is clear slime on the air lines going to the air stones and on the water line of the plastic trash can. I even have a pond pump in the bottom to add circulation. My water temps are around 76-78 and I suspect that might be my problem. I then started reading about adding 3-5ML/gallon of food grade hydrogen peroxide to my reservoir to keep bad bacteria from growing. 1 treatment is said to last for 4 days which sounds nice. I can get 5 gallons of 32% from https://www.chemworld.com/Hydrogen-Peroxide-p/CW-54-5.htm?keyword_session_id=vt~adwords|kt~|mt~|ta~57098673493&_vsrefdom=wordstream&gclid=Cj0KCQjw3JXtBRC8ARIsAEBHg4mpK0xDwgfBKEUbsToP1hhyQwhF1pfYG2lamRmj5fKEriSRmlDB5-IaApUTEALw_wcB, but I'm not ready to punk down that kind of money yet. Possibly on my next harvest.

Anybody else have experience with using concentrated food grade h202 in their reservoirs? I do water to waste hempy buckets and I'm now mixing my nutrients on demand the day I water, because I had to dump several reservoirs recently full of expensive nutrients at least until I figure this out. H202 seems to be he answer. I'm sure as hell not buying a chiller. Too rich for my blood. I'm just trying to keep the bad shit from growing in my reservoirs. I have a ridiculously overpowered air pump running to 2 large air stones in each reservoir and a 400GPH pond pump in the bottom of the 32 gallon reservoir for circulation. I really think it's just the water getting too warm.

Would using RO water help solve this?

RO water would be less likely to bring contaminants but the system is already contaminated. Pool Shock is a common solution, H2O2 can work but is more expensive in the long run.

With pool shock 0.1 grams in 10 gallons = 1 PPM free chlorine.

Usually around 0.015 grams per gallon will do the trick. You need an accurate scale. With pool shock a small bag will last forever. Don't get the super shock, just regular HTH pool shock (calcium hypochlorite)

Info on H2O2:

How much hydrogen peroxide in hydroponics
You should never add a concentrated hydrogen peroxide solution directly to your reservoir. Always reduce the concentration first by mixing one part of the 35% concentrate with eleven parts of water.

So if you take one ounce of food grade peroxide, mix it with eleven ounces of water to get a 3% solution. Always use fresh distilled water if possible for best results.

The recommended amount of 3% solution of peroxide per gallon of water in hydroponics is around 3ml per liter or 2-3 teaspoons per gallon of reservoir water. Please note that we are talking about the diluted solution, NOT the 35% concentrated peroxide.

Just to be safe, when you start the dosage, add a little less than the quantity mentioned above. Your local hydroponics store may have diluted solutions and proper charts and instructions for mixing the stuff.

Each dose should last for around four days. When mixing nutrient solutions, it is best to add the peroxide to one half, and the nutrient to the other and then mix them.

I used Pondzyme to clear up my DWC buckets of pythium root rot. I used it as a last ditch effort before I bought a chiller. The Pondzyme destroyed the slime in about 2 days. I bought Pondzyme on ebay years ago and still have the original container. The stuff looks like sawdust but it worked when everything else wouldn't. I still bought a water chiller but I hooked it up to the flowering buckets and used the Pondzyme on the clone and mother buckets/rez.

i use 35% h2o2 in my dtw hempy buckets, but i've always mixed by hand, i only run 8 plants in flower at a time, in a perpetual, harvesting one every week to ten days. i use 3ml per gallon, mixed into the water first, twice a week. haven't had any root rot problems in a long time.

Roger A. Shrubber said:

i use 35% h2o2 in my dtw hempy buckets, but i've always mixed by hand, i only run 8 plants in flower at a time, in a perpetual, harvesting one every week to ten days. i use 3ml per gallon, mixed into the water first, twice a week. haven't had any root rot problems in a long time.

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96ML for my 32 gallon reservoir. That's nearly 1/2 cup of 35% h202 each reservoir fill.

Roger A. Shrubber said:

i use 35% h2o2 in my dtw hempy buckets, but i've always mixed by hand, i only run 8 plants in flower at a time, in a perpetual, harvesting one every week to ten days. i use 3ml per gallon, mixed into the water first, twice a week. haven't had any root rot problems in a long time.

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hey roger, I haven't to my knowledge ever experienced any root rot issues. my reservoir just keeps growing slimy shit as of late. I went ahead got a gallon of h202 @ 35% for under $20 locally. food grade too. I was a little shocked at how cheap it was after seeing the prices online. I'm going to start adding it to my reservoirs at my next mixing at the rate you suggested. I also run hempy buckets. nice running into another hempy grower. I'm flowering 4 at a time now and increasing to 8 moving forward. 4 just takes too long to fill out my scrog net. 8 will accelerate the process nicely and allow me to hit my goal of 1.5 pounds. I use #4 mother earth perlite for my medium top to bottom. maxi grow and maxi bloom. floralicous plus in flower. results are stellar, but my last harvest only hit 13 ounces. I was very bummed, but the quality was much better than my previous harvest that hit 14 ounces. I have been flowering with 1 600w hps. in the middle of my last cycle I got froggy and threw up a second 600w hood which definitely resulted in larger flowers. I'm going to run 2 600's in flower the full cycle from now on, and hopefully I'll hit my goal of 1.5#. I attached a few pics of my current plants that are bushing out in the scrog net in my flower room. gg#4. 8 clones rooting in my clone tent and 1 seedling of maui waui. I'm really hoping that 1 maui turns into a lady for me.

jonnynobody said:

hey roger, I haven't to my knowledge ever experienced any root rot issues. my reservoir just keeps growing slimy shit as of late.

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sorry to jump in but use chlorine instead. it's a nutrient used by cannabis and it will be way cheaper than peroxide in the long run.

rkymtnman said:

sorry to jump in but use chlorine instead. it's a nutrient used by cannabis and it will be way cheaper than peroxide in the long run.

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no shit? I've never heard that suggestion, but cheaper has my attention. I'll read up on it. Thanks for the info

Read up on pool shock

Damn that is a lot of peroxide. I used 120ml/20 gal and burnt my roots off. Literally wiped what was left off the sides of the netpot. They made it through though, somehow.
I have heard professional greenhouses often use chlorine in some form.
UC Roots is supposed to be PH stabilized hypochlorus acid aka HOCL iirc. The power molecule component of chlorine which does the heavy disinfecting.
I use neither, just saying.

I much prefer the pool shock over the H2O2, shelf life, cost and effectiveness.

I added 135ML of 35% h202 to 32 gallons of solution. I watered and had no ill results the next day at all whatsoever. It's been 3 days since and today they look beautiful. My reservoir I added the 35% h202 to has stayed clean and the other reservoir I did not add h202 to has begun to go rancid. Slime accumulating on the air lines and water line on the insides of the res. I added 3% h202 at 4ML/gallon to my clone bucket also. Clones look great with healthy white roots. No slime. I'm sold on h202. Great shit. I'll read up more on pool shock, but 1 gallon of h202 may last me the entire grow. For $18.50/w tax I'm onboard. Fucking hate dumping a full res because of shit growing in my water. Never again.

the first step is reducing the water temp in the hydroponics I think that is your root of the issues. After that is under control then you can mess with things like bio's and sterile methods.

no matter what at that temp your gonna be fighting with it all grow. 76-78 is super hhigh i would think 68-75 would be alot more acceptable.

things like insulating buckets and whatever else u can think of to reduce heat input into ur water would help first, then dive into the next step like h202 , or great white or whatever

Renfro said:

With pool shock 0.1 grams in 10 gallons = 1 PPM free chlorine.

Usually around 0.015 grams per gallon will do the trick. You need an accurate scale. With pool shock a small bag will last forever. Don't get the super shock, just regular HTH pool shock (calcium hypochlorite)

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I've been using H2O2 to keep my rez sparkling clean, but the online cost doubled recently so want to look at other options. What's your protocol for using pool shock? How much, how often, and how often do you change your reservoir?

rkymtnman said:

sorry to jump in but use chlorine instead. it's a nutrient used by cannabis and it will be way cheaper than peroxide in the long run.

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When I was running several reservoirs for flood and drain I used just plain chlorine bleach. I also used the 35% h2o2 but switched to bleach due to it being much cheaper and does the job. Kept the reservoirs clean and had no effect on the plants. .5 ml per gallon of the standard 6% bleach you buy at the store gets you to around 5 ppm's.

xtsho said:

When I was running several reservoirs for flood and drain I used just plain chlorine bleach. I also used the 35% h2o2 but switched to bleach due to it being much cheaper and does the job. Kept the reservoirs clean and had no effect on the plants. .5 ml per gallon of the standard 6% bleach you buy at the store gets you to around 5 ppm's.

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How often are you adding the bleach?

The difference between pool shock and bleach is bleach is sodium hypochlorite and pool shock is calcium hypochlorite.

Nizza said:

the first step is reducing the water temp in the hydroponics I think that is your root of the issues. After that is under control then you can mess with things like bio's and sterile methods.

no matter what at that temp your gonna be fighting with it all grow. 76-78 is super hhigh i would think 68-75 would be alot more acceptable.

things like insulating buckets and whatever else u can think of to reduce heat input into ur water would help first, then dive into the next step like h202 , or great white or whatever

Click to expand...

Since treating my large reservoir with h202 I have not had any further problems. Plants look great. My reservoir temps haven't changed in 2 years. This rancidity problem has been a recent development. Either way I'm not buying a chiller when h202 is as cheap as it is locally. No reason to over think it.

graying.geek said:

I've been using H2O2 to keep my rez sparkling clean, but the online cost doubled recently so want to look at other options. What's your protocol for using pool shock? How much, how often, and how often do you change your reservoir?

Click to expand...

I don't change my reservoir. About 4 PPM is strong and will do the job. I have been able to get away with less.

With pool shock 0.1 grams in 10 gallons = 1 PPM free chlorine.

A little goes a long way. Don't get the super shock, just plain HTH pool shock.