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res temps 80+, how to avoid root rot?

scurred

Member
Good work, Hope you can keep your temps that low. I'm right there with you in the mid to high 70's rez temps in my veg room. I have to say I was a bit skeptical at first but low levels of bleach are keeping everything clean and happy. I was having a bit of algea and root rot in my last drip run this summer when temps were 80+ in my rez. 2 doses of bleach and it was all but gone and way cheaper and easier than hydrogaurd which is I believe chloramine based.
Scrogger, I'm running with the water level just above the bottom of the net pot as recommended by Heath and root growth is much more even and prolific. Yet another bong toast to the master...HM

Wait, you add bleach directly into your resorvoir? Even when you have living plants in it?
 

BeaverHuntr

Member
I use 5 gallon sport coolers to keep my res temps at about 65 degrees. They dont ever get any higher than 68 degress even after 7 days.
 

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Scrogerman

Active member
Veteran
Stick a dedicated fan on your Airpumps intake for even more control. As roots envelop your airstones causing backpressure on your pump making it warmer, however warmer it is it will help im sure, the next best thing to a chiller imo. Ive found especially helpfull half way through bloom, touch test your pump at that time & you'll see what i mean. The fan right on the intake move closer or further away & watch Res Temps change to your favour. You can almost controll the Res temp. My best tip ever & main contribution to this site! ;) Works for me really well.

Ive got alot of inspiration from the man Heath R, fair play, the airgap thing is bang-on & i now understand what he meant & have applied the tec to my last 2 DWC attempts! It defo works! Before the closest id get was 1"-2" but now its always around the 1mark maybe less, many more finer roots involved!Increased everything, but saturation of media does need consideration & accounted for!(power of pump & how many splashes/water & how close = saturation control, bigger output further away it Might have to be but that depends))
 
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FreezerBoy

Was blind but now IC Puckbunny in Training
Veteran
NOT a recommendation but, I've done it into the 90s with no trouble. Keep the res simple and clean, avoiding all organics and additives. I restricted mine to tap water, GH FloraMicro, FloraBloom and pH Down.
 

statusquo

Member
I've never done hydro and haven't read very much on it but I got two ideas for you. Your problems stem from heat + lack of oxygen. Since it seems controlling the heat is the harder variable at this point, you should focus mainly on o2 and temps secondary (not ignored).

-Waterfalls. If you run some kind of water fall system this will add more o2 to your water than even a BEASTLY air pump. The amount of surface area the water gets with the environment increases drastically and so does the oxygen content in the water.
-h202 (hydrogen peroxide) as others have mentioned. Breaks down into water and o2 - in the right doses not harmful to the plants and keeps anaerobic bacteria @ bay.

-Add an intake fan that draws cool air from somewhere
-Use MH instead of HPS as MH bulbs are hotter but don't radiate heat as far/as much as HPS.
-Not sure if your water is exposed directly to the heat. If so cover it.

P.S. Unless the air temp of the room the tent is in is significantly lower, adding the fan and closing it up shouldn't result in an increase in temperature IMO. Also I remember a thread by some mod or super old timer showing how he was pulling off hydro grows at 82+F with no problems and explained why the "high temps automatically = problems" saying was slightly misleading. Maybe someone knows what I'm referring to lol. Anyways best of luck man I hope you figure something out! :)

Edit: ^lol I think it was freezer....what a coincidence! Also, it looks like you already employed 2 of my heat decreasing suggestions haha.
 

imadoofus

Active member
Veteran
as long as you avoid organics and additive alchemy, high temps do not consitute root rot.
despite the popular census, pythium doesnt cause root rot- it sets in once your roots are dying/weakened. as long as you have ample aeration to your res and stay away from additives, organics, root rot will never be a concern.

i prefer my res to be at least 80f, but up to 90fs is tolerable at the sacrifice of slower growth.
 

Scrogerman

Active member
Veteran
Its low O2 ppm levels & res solution temps. Temps any higher than 75+f promte Anerobic bacteria, especially in a low o2 environment. at 80f D'O levels are virtually non-existant & H2o2 would be the answer. 65-72f for max DO, anerobic bacteria dont like this environment. Pytheum is less & less of a problem these days but Anerobic bacteria can cause problems, & they just love 80f solution with Low DO, its more than ideal & a bigger threat. Funny enough ive just had a bacterial bloom in my res, PH dived & EC dived, so i knew after a few days of adding straight water what the issue was & have applied H2o2 with Nutes & PK only! i know it well!

best o Luck!
 

illchemist

Member
I second Freezerboy and imadoofus. Keep it clean with no organics. Give it lots of O2 and you can even add a little peroxide for good measure. Change the tank regularly. GH Flora series is a very tolerant line.
 

Scrogerman

Active member
Veteran
Id try not to run 80+ temps in DWC mind(freeze bottles if you have to), just my opinion, if your going to know you will have high res temps, prevention is better than the Cure, H2o2 will look after you! with mineral ferts & zero organics! thats for soil really, organics in hydro is for an experienced hand for sure!

Nobody i know would recommend 80+ res temps in DWC, no D'O, not exactly the right way to do it! ;)

use a root shield or Run H2o2 & even if your temps are a little high you should still be OK! Always think Max D'O(dissolved oxygen) for max nute uptake & best growth, hence 68-72f res temps)
best o luck :)
 
T

Tonka

Keep using the aquashield. That stuff works wonders in PREVENTING rot. Adding in H2O2 (peroxide) with aquashield may prove to be counterproductive because it might kill the bacillus subtilis (but I could be wrong).
 
T

Tonka

Hygrozyme needs to be used from day one or your gonna get problems, unless you innoculate with beneficial bacteria first off, then you can use the hygro at any time, just make sure you innoculate first with the bene's, or its very likely you get a BrownAlgae Bloom, the dreaded herpes hydro slime, not good. But i see a few growers who have problems with high temps in DWC & the Hygrozyme works well for them, of course they know how & when to use the stuff, it can be a danger if the measures i mention aint taken into account. If i was you id go with the bottle run like i told you in your other thread when you first had problems, that coupled with H2o2 & mineral ferts & your stella mate, believe!

Also as your man Bud there tried to point out, try putting a dedicated fan on your airpump so it keeps the fan & surrounding air going into your res cool, i always use a dedicated fan on my pumps, works a treat! could be as simple as adding a fan & setting it close to your Pump, pointing directly on it, it will help loads im sure!

:yeahthats

Algae bloom is a nightmare
 

ChaosCatalunya

5.2 club is now 8.1 club...
Veteran
Lag your system ?

If you insulate your DWC buckets, Res and lines with reflective material, less light will hit the black plastic and heat the solution, preventing the problem rather than chasing a cure.
 

Scrogerman

Active member
Veteran
algae is completely harmless in hydro.

picture.php

Depends what type of Algae it is, generally its not a good thing, if algae is growing in your DWC res, then you are doing something wrong, if your letting light into your res it can cause all sorts of problems. 'Brown Algae' will kill plants dead, starving & smothering roots with slime so they can not funtion. dreadfull stuff! theres a few threads on the subject here at IC.! that stuff doesnt need light to bloom either.

best of luck !

whats with the Blue roots? what type of Algae causes this then man? Roots grow better in a dark environment.
 
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trichrider

Kiss My Ring
Veteran
Whoops, sorry. It's DWC

I couldn't afford an air cooled hood on top of the light, tent, ro system and all the other random things. What's funny is the tent isn't even closed right now, I have the door completely open and a big oscilating fan blowing into it, res temps are still 80.

I will be adding a 265cfm dayton for exhaust, and 2 6" duct booster fans for active intake to try and help... but I predict the temps will only increase once I add those fans and close up the tent.

I imagine the res is getting warm because the buckets are black and the light is just sitting there slowly heating it all day.

Thought about adding some hygrozyme in there, not sure though.
no you're not...get back when you have some real ventilation.... a fan blowing into your tent will NOT make it...the temps will not increase with ventilation, they will decrease.
makes my day to help peeps, please heed!
 

Andyo

Active member
Veteran
fe precipitation

fe precipitation

get yourself a water ozonator, bubble it through twice a day for 20 minutes. Will kill pathogens like root rot.

Be aware that ozone dissolved in nutrient solution will affect Fe levels


At temps of 80 you need 30 plus litre of air per 5 gallons of water PER MINUTE
Im near the equator my flood drain 300 ltr res are 26 c i bubble a little ozone through them no root rot crystal clear water .I dont have any fe precipitate .
Ive seen it precipitate under uv light but not ozone .A
 

!!!

Now in technicolor
Veteran
bleach at 1-2ml/gal added every 2 days (or as soon as the chlorine smell is gone.) Try to get chloramine as it won't evaporate and so won't need to be added regularly.
 

Scrogerman

Active member
Veteran
What you got on Chloramines !!! man? possibly harmfull i always thought, getting some contradictions what i'm reading, harmless/toxic etc.
 

scurred

Member
What you got on Chloramines !!! man? possibly harmfull i always thought, getting some contradictions what i'm reading, harmless/toxic etc.

Yeah, but I guess there are products for hydro systems which are chloramine or something like it, such as DutchMaster Zone.
 

!!!

Now in technicolor
Veteran
What you got on Chloramines !!! man? possibly harmfull i always thought, getting some contradictions what i'm reading, harmless/toxic etc.

harmful/toxic to plants or humans? They're toxic when concentrated but I don't think they harm the plants in diluted form. DM Zone and other products contain chloramines or chloramine derivatives AFAIK.
 
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