Water to cold? Dwc

I believe that I read on these threads someplace that "optimum" temp for oxygen absorption into water is 50 and that 52 was the lowest this grower had reached.

so you sound good as far as temps go.

not sure what your plants think about that air temp.

why are they "stressed"?

 

What temps you’ll get away with depends on a few things mate.
how much air you’re using and wether your growing with beneficial bacteria or sterile growing makes a big difference.
I grow NFT which is kinda the opposite to dwc.
You use water pumped full of air.
I use air with a little bit of water mostly.
Once my root mass gets up though they drop down into what’s essentially a dwc res but one that doesn’t require an airstone as it’s recirculating.
Anyway, when I run sterile I can go upto 27*c before I need to start sweating but that’s cos there’s no bacteria to grow and basically unlimited oxygen.
If there’s bacteria in the res, good or bad then youre better to keep it 19-22*c to avoid the bad bacteria getting too comfy and give the good stuff the best chance of taking hold.

 

Hydro guard is probably the most popular option mate. Gotta make sure you don’t run too high though.
£20 a litre but that litre makes 2000litres of juice.
Hydrogen peroxide is the top choice for most sterile guys. Bleach works just aswell though.
It’s not a daily thing for iether method. Just mix it in with the nutes.
Hydroguard is 0.5ml per litre.
Bleach is 0.3ml per litre and hp I’ve no idea but will say on the bottle.
Change nutes out every 7-10 days regardless and all should be good

 

Oh and sterile growing destroys all bacteria mate, good or bad.
Doesn’t destroy nutes though.

 

Nah just 0.3ml per litre in with any nutes you add mate.
It’s also worth noting that if growing sterile it’s beneficial to leave the chlorine in if you’re using tap water.
If using bennies you need to air out the water over night to try get most of the chlorine out as it kills the good stuff.

And yes, you need to swap out every 7-10 days.

Once you’ve got a couple grows under your belt you can take the piss with it a bit more but root rot kills plants fuckin quickly man.
Had it 3 times and it cuts deep
First 2 were experiments to see how far I could push it without changing.
Furthest I got was 2-3 weeks to harvest then the full plant collapsed as the main stem had liquidised at the bottom.
Last time was an accident though and cost me about a pound of ak47 and 4 months worth of spends growing it.
I only went 4 weeks and had sm-90 in it which is like bleach with boosters.
Had a rough time with life and got lazy thinking it’d be ok but nae

Swapping out the res regularly is THE BEST WAY to avoid root rot regardless of anything else you do.
Don’t risk it man, it’s a big investment to be gambling with for something so simple.
You barely need any nutes in hydro too. I’ll explain that bit if you like?
Cat sleep lol.

 

Right buddy, based on what I can see and what you’ve said here’s a lil tip.
See the 4 wee ones.
Look at the 2 on the left.
Get some root riots or rapid rooters. Wee sponges that are £5 for 24 on amazon .
If you can’t get those use 1inch rockwools but rr are much better.
Untill they are that size and there’s roots poking out the bottom you just keep them in the cube and use a spray bottle to water them.
Don’t soak the cubes but don’t let them dry out.
Just water. Zero nutes other than 0.5ml per litre root boost or bennies if you’ve got em.
If your tap water is shite or over ph 7.5 then buy a bottle of Evian, volvic or something. Don’t fuck about ph’ing things though.
It’s not necessary for the first 5 days above ground. As long as you give them decent water they’ll do about as well as they can.
Once they get to the size of the biggest small one, you’ll see them start to fade. Day 5-7
That’s the cue to start feeding them and get em plugged in. Doesn’t hurt em.

Start the res at 100ppm nutes plus the water at ph5.7
After a week, they’ll be the size of the big one at the bottom, fully rooted up and fairly indestructible.
Then set the res to 200ppm plus the water at ph5.7
After a week or 2 the ppm will start to drop in the res so go up to 300ppm.
When the ppm starts dropping again you go up to 400ppm.

If you do that the ph will behave itself best it can and you ensure that you never have any over feeding problems.
Underfeeding isnt a problem, you see it, add more nutes and they fix.
Overfeed and all sorts of weird stuff can pop up and you gotta fuck with the ph more often

 

You shouldn’t be using anything organic in hydro mate.
Another one of those things that just isn’t a good idea.
Things go all mr Canuk and it doesn’t end well.
If you want organic weed go fully organic with a proper living compost otherwise it’s pointless.
Don’t mix grow styles untill you know what’s what.
It’s a confusing path as it is without complicating things .
The only organic exception in hydro is beneficial bacteria things, “live” products. Bennies
Those are good but as previousy stated bleachers will kill them.
They’re also not nutrients as such. Usually things that react to things and the reaction is what benefits the plant. Generally not the “nutrient” itself being absorbed.
That make sense ?