Physan 20 and seedlings.

[Dirty Budz]

So I emailed Maril Products todayy (creators of Physan 20)

This is the email I sent:

Hello, I have a question regarding your product physan 20, I plan to use it in a hydroponic-aeroponic system in a medical marijuana grow on 1 week old seedlings, the system is old and has acquired cyanobacteria. The water is RO'd and is currently not being given any nutrient solution. what is your recommended dosage to put into the 5 gallon reservoir. I know to use 1ml/10 gal on larger plants and run it continuously with no problems and great healthy roots, but was wondering if i should do the same with seedlings or use less.

This is the response i received:

Thank you for your email and your support of our product. We recommend keeping with the 1ml/10 gallon rate for both seedlings and mature plants. This rate will help control pathogens in the water system without causing any ill effects to the plants.

Regards,

Tom Whitehair
Maril Products, Inc.
www.physan.com

Just a heads up to let everyone kow at this dilutio rate Physan is safe with seedlings.

 

[Snype]

That would be over 2.5 PPM Chlorine at those rates. Personally, I wouldnt use more than 1/2 mL per 10 gallon which is around 2 PPM Chlorine.

Ive killed plants in RDWC with higher rates. Those rates you stated may work better with grows that arent constantly submerged in solution like flood and drain.

 

[Dirty Budz]

Personally I've run 3week old plants in 1ml/gal in a aeroponic system for 1week straight and they were fine, but like you said DWC might be different.

I believe in sterile hydro, save the organics and bennies for soil.

 

[Thachrizzy]

I second what Snype says...DWC is different. Cut that application rate in half and it will work like a charm.

 

[doneit]

Physan is some nasty stuff.. I played with it last year.

I would not use it in any system.. better off with plain clorox.
The physan does not dissipate and will kill your roots at any level over time.

 

[Dirty Budz]

Physan 20 dose dissipate. it turns to Nitrogen in 3-7 days I got turned onto it by the folds over at GrowKind, they use it at 1ml/10gal (This is by far the cheapest root conditioner at that rate) and have amazing roots the use it all the way from clone through flower.

http://forum.growkind.com/showthread.php?t=41544#.UsBYQPRDuoY

Also this is a post from a retailer of Hydro Sparkle/Hydrofungicide explaining more about Physan.

https://www.icmag.com/ic/showthread.php?p=3863264#post3863264

One-Two Punch Directions for a Nasty Reservoir

1 – Add Physan20 to your existing tank at a rate of one teaspoon per 15 gallons of reservoir. This comes out to 1ml of Physan20 for every THREE gallons in your tank. So divide your tank gallon capacity by 3, then add that many ml of Physan20. Run this tank for 3 days. Groovy set up a wholesale account with the manufacturer of Physan20 after we had a nice chat with the owner of that company. They are only 5 miles away from our office. We didn’t pull any punches, we asked what the application rate for MMJ Hydroponic reservoirs would be. The owner let us know that although Physan20 is a poison, in the dilution he recommended it would NOT be toxic to the plants.
Furthermore, he let us know that Physan20 biodegrades into NITROGEN in 3 to 7 days depending on the tank conditions. Therefore he stated that plants will not concentrate and store the toxic elements of Physan20 and will pose no threat upon consumption of the MMJ Crop. For this reason we recommend running the initial dose 3 days, then draining the reservoir to eliminate any traces of Physan to ease your mind, and also to clear out any dead organic matter such as dead algae, fungus, bacteria, and dead root matter.
2 – Mix up a fresh reservoir of your regular nutrient schedule. Lastly, add in 2ml of Hydro-Fungicide per Gallon of your new reservoir. Add the same ratio to any top-off water you add, and replenish the full amount once a week if you haven’t changed your reservoir out yet.


The reason the Physan20 is great to use first ONLY IF your tank is nasty is that the Hydro-Fungicide manufacturers suggested use for a problem tank is an application rate of 20ml per GALLON the first day, decreasing each day by 2ml per gallon until you reach 8ml per gallon and continue that out until 10 days has gone by. This is a very large amount and we dont want to see anyone spend that much to clear up a problem when Physan20 can wack it much more efficiently. In the manufacturers defense, they do state that 'it may be best to clean the tank first'. You can view the full original australian product instructions as an attachment below.

Also this is directly from their website:

Physan 20 as a Foliar Spray for Pathogen Control

Physan 20 can be applied to plants as a foliar spray to control pathogens. However, it is NOT an insecticide and will not kill aphids, mites, scale, or pests of this sort. Physan 20 leaves no harmful residue if foliage is dried and smoked.

AND THATS WHEN SPRAYED TOPICALLY!, Also if you read the directions for physan when you treat algae with you must respray every 4-7 days as it dose dissipate!, I tried everything to beat the slime, H202, SM90, DM Zone, nothing worked! this stuff stopped it dead in its tracks, the next day the slime was dead throughout the system, my res is kept at 67 degrees, 100% lightproof, and somehow this stuff came about, probably from using old equipment i haven't used in awhile.

 

[Dirty Budz]

Sorry cant seem to edit my post, but the stuff isn't even strong enough to kill little bugs, just microscopic bacteria. I don't think it will bring harm to you and your plants. There is allot of misguided information out there, and just a general lack of logic...

And for the record until my 100cc syringe comes in I've been running physan @ 1ml/5gal for a week now on seedlings and they are doing amazing!

 

[MIway]

i like physan, use it as my sterilizer on a reg basis, esp since you can play w the dose

but, it is touchy. have sprayed cuts w it under flouros at the orchid rates & caused foliar spots/burns. used it to soak fresh cuts for a werk at only 2drops per liter & it turns the bottom of stem a bleached white color (damaging cells). just need some discretion w its use.

 

[Dirty Budz]

orchids seem to handle much greater concentration then mj.

 

[TheShitSandwich]

I just got my first bottle of Physan 20 in the mail. I have been reading all of the posts related to it on the forum.

My question is: For all for the horror stories on here, what are the doses at which they had a negative effect? I am especially interested in the people who claimed that residual Physan 20 killed their plants after doing a res change. I just cannot believe it

Grapeman?

I am planning on going with the recommendation at the beginning of this thread at 1ml per 10 gallons. Has anyone EVER had a problem at this rate?

 

[Dirty Budz]

I just got my first bottle of Physan 20 in the mail. I have been reading all of the posts related to it on the forum.

My question is: For all for the horror stories on here, what are the doses at which they had a negative effect? I am especially interested in the people who claimed that residual Physan 20 killed their plants after doing a res change. I just cannot believe it

Grapeman?

I am planning on going with the recommendation at the beginning of this thread at 1ml per 10 gallons. Has anyone EVER had a problem at this rate?

I run physan at 1ml/5 gal, on seedlings from start including soaking the rapid rooters in physan treated water, this is twice the dosage recommend, all my plants are healthy as anyone else's. I've now run it on 8 strains from 7 different breeders, the active ingredients in physan are used in many things, such as spermacide in condoms and lubricants and shampoo and body wash its very safe physan is highly concentrated a lot of it will be poisoning ... So will alot of the nutes you use. Try it, you won regret it. 1ml/10gal.

 

[beta]

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