Good to know. Keeping ice packs in the res too from now on.
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Just curious if you’ve ever mixed 1g of masterblend in 1gallon of RO water?
I would be curious if it matches this, or there abouts, or if 2.4g equals this PPM.
That’s about where I was coming out with 2.4g mb 2.4 cal nit 1.2 epsom salt. About 850 with the silica and bennies.
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So might look something like this.
790ppm with your tap water, and the remaining would be your silica and bennies I’m guessing to bring you to 850.
Me personally would up the Mg to 60ppm. Trying to hit a ratio of 4/2/1 with your K/Ca/Mg. @GramTorino pointed this out to me…he has more wisdom than I 
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In a small reservoir like a single bucket you can easily strip the available DO levels even with cool temperatures without agitation/bubbles. Hence the air lines. Temperature is just a limiting factor/bottleneck.
It happens in aquariums and ponds, too if you have too many fish/critters and not enough agitation. Just because the water is cool doesn’t mean still water automatically pulls in atmospheric oxygen immediately.
So if I’ve got everything right about how long do yall think she’ll take to recover?
You’ll see new white roots visibly sprouting within a few days. You’ll notice a huge improvement in a week.
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This is a good read…
https://manicbotanix.com/rtwdtw-hydroponic-growing-systems-v-recycling-systems/
ok! trigger physics mode.
Absolutely more oxygen will be absorbed even without agitation through the surface layer. That’s how shallow cultures work, but for the deep water - it would leave the majority of the water without oxygen in 24 hours after filling a bucket. So the agitation constantly exposes new surface area in the water for oxygen to penetrate. The oxygen comes from the atmosphere, of course.
To satisfy your pedantry,
"Just because the water is cool doesn’t mean still water automatically pulls in atmospheric oxygen immediately at levels needed to sustain a plant in a DWC bucket like OP has
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hey I’m more interested in the biofilm claim. You figure there is some other way than light or heat to trigger pathogen growth to kill the plants? A buildup or something? That is treated by bleach or peroxide.
I’m not saying you started the thing telling people to use stuff like that. Hell no, I remember getting that exact same info 20 years ago. The thing is, I couldn’t determine that it was having any beneficial effect on the plant. So I quit doing it and never looked back.
So what are we talking as a trigger to kill 'em? I’m always into a good death experiment.
Do you not get any biofilm buildup at all in your reservoir/tubing? It grows without light or heat in non-sterile environments. One of the many reasons most tapwater has a small amount of bleach/chloramine.
I wouldn’t call it a pathogen, biofilm isn’t harmful to the plant per se.
Plenty of research papers on chlorine and hydroponics/nutrient solutions. It’s a very common thing in commercial nurseries/greenhouses.
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naw I’ve never seen a biofilm buildup. I’ve been looking for signs of life establishing a niche in the system, but nothing seems to really survive. I used to get those stupid fungus gnats when I used those hydrotron pebbles, but they were just annoying not dangerous. That plant I have joined together has been in that single bucket for 6 months. I don’t see any signs of life, though.
Unfortunately, research papers and things people do in commercial greenhouses, don’t have any real-world results I can see. Believe me, I was working off those ideas long ago, but abandoned them when there was no result I could put my finger on. What I am looking for is some kind of “oh if you put peroxide/bleach/dog piss in your reservoir”, you can expect “this to happen”. “This” being a result I can hang my hat on, right?
Before I forget, I really DO appreciate your input @vernal, you are brave. No shittin.
they do look less slimy, hows the slime doing? I don’t see the dark brown patch on there anymore.
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They weren’t very slimy to begin with and there’s none now. Gonna need to get a window ac unit and some better ventilation going before spring rolls around and Temps start rising.
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great! So the leaves are showing signs of improving, and there is less stress on the plant overall?
No noticeable improvement in leaves yet. They seem maybe a bit perkier up top but that’s it.
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Take a picture of the leaves in a couple days or something then we can compare a before and after.
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Will do, I’m leaving her alone for now aside from ph/temp checks and adjusting, I’ll add sterile nutrient solution as needed.