g-one-three
Well-Known Member
So I'm not outta stash but it's starting to head down lol.I was just doing a bit of reading on deionized water. It says humans should not drink it because it will remove ions (both cations and anions) from our bodies as it reabsorbs what the deionization process removed from it.
It also said that if you use it for plants that it's an excellent base to build water from, as in if you add ions of your choice such as calcium and magnesium back into it, but RO is a better choice as it leaves both oxygen and CO2 in the water, and RO removes bacteria and pathogens that DI doesn't.
Your plant does look over watered in some aspects when it's definitely not as you are not using the SIP function and you are letting it dry down, so I would guess that it very well could be the DI process.
Over watered means lack of oxygen, which is why plants that are over watered look like they are starving.
Plant food must have an O2 molecule attached to it in order for a plant to recognize it as food.
I would try a flush of RO only water, drain the res, let her dry down again, and see what happens, however in flower that may cost you a few days growing time until she dries down.
The other option would be to continue your current watering schedule but lose the DI.
That would take longer to replace all the moisture with the RO only water, but would be gentler. I'm a tear off the bandaid kind of guy but I'm also the 1st to admit that sometimes that isn't the best approach, and I always have a couple pounds in my stash so that luxury allows for a failed grow, so thats a consideration too.
Half your plant looks fine so if your stash is low then protect that 1st.
Either way will work so your choice there.
Maybe split the difference by letting her really dry down but not wilt, then water her up without an actual flush?
Ill run 5 gallons of just the RO part and aerate it with an aquarium pump. We can see if that helps.Drain the reservoir either way for now so the only change is the type of water to see if you get better results?
2This is interesting, because if that's the issue then the plant gets to choose which limbs get priority treatment. They never stop amazing me.
How many plants do you have in flower right now?
NopeAre they all showing similar symptoms?
Its all I've used on my last 2 grows. The plants that were sativa leaning, purple haze and white widow, showed deficiencies similar to this. It would explain the sudden onset of CalMag deficiency as the RODI water is pulling anything out of the soil it can as it passes through. I've read a couple of things about how people who only drank RODI water end up losing teeth because the water pulls the calcium out of their bodies. Weird stuff.Have you successfully reached harvest using DI water in the past?
I could try my tap water but man it's coming out of the spigot at 580ppm. Its hard water but runs through a softener and when we got it tested iron was the only thing high.
The RO water is running right now and coming in at 91ppm which is up from what the RODI was running at 8ppm lol.
Is there anything I can add to help charge up the population of microbes I possibly destroyed? I have liquid Kelp, Neptune's harvest and Recharge. I also have Dynomyco I could top dress with.
Ya it's auto set, I haven't gotten around to getting a IR gun yet. There is a spot to add in leaf temp so when I get IR gun I'll add it in.Also, your VPD readout of 2.0, does that take leaf temperature into consideration or is it auto generated by the monitor?
If it's auto generated with no leaf temp input, thats the vpd of your air, not the vpd that your plant is running at when exposed to your air.
Read thru the instruction manual. If it has a "leaf temp offset" input option then I can tell you how to determine the real VPD, but you will need an IR thermometer gun.
VPD when applied correctly is a huge plus, and when applied incorrectly can be a huge detriment.
2.0 is way too high so I suspect that it has a leaf temp offset input area, it's just set to zero right now.
My VPD calculator only uses whole numbers, so the results are slightly different than yours which uses decimal points too, but if I plug in your values with a zero leaf temp offset then I get your values pretty much.
So with the addition of the heat mat, the soil temp is hovering around 71° consistently which is about 4+ degrees warmer than when the lights were off