Irie420
- 17
- 3
You are correct and using RO water has virtually no impact on ph. That's the reason you do not need to ph your nutrients unless required for mixing purposes.If I’m not mistaken ffof is amended with lime so it shouldn’t be the ph.
You have a water softener I am assuming. What's the ppm if you have a source of water before the softener?Lights are 36" (gavita's above plants and I've been religiously keeping that distance the same. Chasing ever closer internodal spacing I was at 24" for a day or two, and yeah they didn't like that haha. I guess raising them another few inches wouldn't hurt til I get this under control all the same.
I'm stuck using RO as my tap water comes out between 9-9.5 and over 100ppm of sodium. Aquaman is correct in regarding the RO not really needing to be adjusted much if at all. Indeed I really haven't had to adjust it much if at all. I did apply great white and superthrive at separate times during this grow and those were the only times I needed to adjust the pH
I started adding cal-mag to any waterings since the deficiency presented after giving them a foliar spray with it right before the lights went out for the night.
So this is due to the time it takes lime to activate ad it happens slowly. Usually 2 weeks. Plus the ammonium in it so once you have the microbes established it converts the ammonium to nitrates, the lime is activated and the PH should then be in range.FFOF is actually amended with oyster shells to raise the pH, but the scenario is the same. I do see quite a few forum posts about FF's soil qc declining in the past few years. Posts about the soil coming out of the bag at 6 or under. I kinda brushed that off as I've had dozens of successful grows with Ocean Forest in the past but perhaps a slurry test or testing the runoff is worth a try? Although you'd think the other plants would also be suffering a similar fate if that was the case. I'm kinda out of ideas for other things to check at this point. Looks like nutrient burn (despite using no actual nutrients) and micronutrient deficiencies simultaneously which does kind of indicate a pH issue to me. Idk man guess we'll see how she goes. Thanks to everyone that responded for taking the time to try and offer some help.
Dude that is absolutely about as good as it gets for tap.View attachment 1138812
Looks like I may have been mistaken about the sodium content. I've seen it come out the tap over 10 before though which led me to say reverse osmosis is the way
Yeah sorry always looking for things that can be improved.I have not ever used tap water on this crop though so the quality (or lack thereof) of the municipal water supply really doesn't matter I guess. Just derailing the discussion
I actually just looked up the water quality report I had assumed anything with a pH of 9-10 was gonna be trash. Never really looked into it further. That's good to know and once I figure out current problem I'll definitely start aerating buckets of water and using that. I'd just rather not introduce any additional variables until this is sorted out. So in your opinion I should just back off the lights another 6" and otherwise keep doing what I'm doing?Dude that is absolutely about as good as it gets for tap.
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