There are a great many buffers you can use, dolomite lime is only one. Oyster shell flour is used in chicken feed, might be able to find it in a farm supply store. Basalt dust or other rock dusts can work as liming agents too.
If nothing else, five dozen eggshells is a pound of almost pure calcium. Rinse em, dry em, toast em in the oven, and grind em. Done and ready to use
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That sounds like something worth doing. I found the calcium hidroxide, do you think it will work?
The formula says itâs 60/40 Cal/Mag. And that it unblocks the roots and corrects pH, so it sounds like the same to me.
The plants want a lot more calcium than magnesium, so if your soil mix has plenty CA or if youâre supplementing it with something like the eggshells, sounds like it would work fine.
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No no no my mistake, it was the other way around 60/40 CalMag
Fertimins Hi Cal Mag.pdf (200.6 KB)
I would not add calcium hydroxide directly to the soil, if thatâs what youâre proposing. It could maybe be used to adjust the pH of nutrient solution on the way in, but itâs very much a chemical that raises pH, donât think it would be any good as a soil buffer.
@MadScientist Hey my friend donât panic and flush your soil. When you have a burst of growth in flower you will get some die back on the leaf tips like that. At the bottom of the plant you will have dark circles on older leaves also. You are getting a lot of growth right now so just give them a little humic or a ferment to unlock some organic matter on a water only day to help your plants stabilize their soil, and keep everything else the same nute wise. As you get later in flower your PH will rise but it should be fine. If you try and manhandle your PH while flowering bad things will happen. I see no reason to flush that beautiful plant.
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Well, thanks for your reply bro. Actually i flushed two of them, last night, gonna open the tent now and see how they are doing 12 hours later⌠WIll take pics, and follow your advice. Thanks @ryasco bro!
Please if you are eating five dozen eggs donât fart in the room other people are in
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Actually I was considering using eggshells as calcium supplement
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Sorry to say bro, that sounded like my wife⌠HAHAHAHA!
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Dude we go thru so much eggs and coffee grounds you might not believe if I told you. Lmao. Thereâs at least two hundred eggs in the fridge right now, no exaggeration.
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Here they are, and the yellow seems to be fading, maybe it wasnât too late to flush, and maybe i did it at the right time. Anyway this is how they are looking this morning. Thanks to all for your time and comments.
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What pH did you use for the flushing? And watch the leaves. Some of them are curled down a bit what might be reaction for too low pH. But only few of them so its a good thing 
Can you use it in Pure Coco??
Water took most of the nutes ot, EC of runoff at less than 0.4. The pH is still at 7.7 but i checked all of the other plants and they are on the same pH. Healthy and robust and all⌠So i dunno.
Only 0,4? Thats wierd⌠When I flush my clean water is about 1,2-1,4 on runoff. And pH about 6.4-6,6. You should definetly add more nutrients and lower pH. It would be nice to know what pH is the water with nutes mixed in.
But its good my friend!! we know what is wrong now and it is the better mistake 
better than overfed! I am sure they Will get better every Day
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My tap water is 6.0-6.8pH most of the time. EC is less than 0.2, so i left it there for the plant to have a little of nutes while the soil dries and i can feed it again, gonna be doing a half strength feed this next time and after that 90% strength.
I got very close to a flawless grow this time around. In January I will setup the 4x4x8flower, 4x2x6veg and 4x2x4clone/mother tents. Three tents to run, and clone a little bit.
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I cannot answer the Coco question no experience with it
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Different strains have different needs, if they are all the same then IDK
When everyone is happy except one, we label it finicky and try to not stress about it. Itâs not evidence that there is a problem with the setup, only that the plant in question likes very specific circumstances.
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So it ouwld be a mistake in my case to run all four different strains in one tent, maybe a couple of years from now, iâll be able to do it. I wanna venture and risk doing it anyway! Will you help brother @Worcestershire_Farms!
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