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Skybound
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  • Hi @Skybound I was wondering if you can assist me with a homemade calmag recipe that can be used instantly for plants with about 6 weeks left in flower, in soil, indoors.
    @InTheShed mentioned that you have a Epsom salt and gypsum recipe.

    :48:
    Skybound
    Skybound
    Sorry, I did not see this message till just now. It didn't come up as a PM, nor on a thread I'm subbed to.

    I can help, though your location (I assume Canada) will likely be a limiting factor. If you are able to track down various nutrient salts, your ability to amend will improve. That said, if you can locate soluble gypsum, this is a form of Calcium that does not have nitrogen complexed with it. Calcium sources in nutrient solutions seem to be about the most complicated to work with. Actually, now that I think about it, you might be wise to read up on Emilya's Egg Shell thread to see about making some calcium acetate as everybody can get their hands on egg shells. Egg shells are made of calcium carbonate which is arguably a better source of calcium, especially for soil than gypsum might be as carbonate will add carbon to the soil as well. But if you can get your hands on gypsum, that would be awesome too. I've read to not use the gypsum that is in drywall, but I still would like to one day test that theory. I only use 0.3 grams of gypsum in my half gallon foliar spray.

    Here's my recipe for that spray. It's light on all the elements, meant to only supplement any shortages.

    High Brix Hydroponics
    Skybound
    Skybound
    Also, some other things to consider. If RH is too low, stomata close to conserve water, if too high, you'll have to reference the VPD charts to keep them sweating as that is how calcium flows up from the roots. Not to mention, if your cationic elements aren't balanced correctly, calcium can be blocked from uptake by extra potassium or ammonium, magnesium can also block calcium if too high. I myself have been trying to figure out the best ratios for the best calcium uptake in hydro. I'm near ideal now, but I want to get it perfect for strong branches and very happy leaves. Depending your media and days into bloom, it might be best to use a foliar spray with some Ca in it and apply calcium to the affected sites directly in a mild dose.
    Hello I was told to get ahold of you as I'am a rookie lol I'm trying to do simple grow first time. I have outdoor green house with hydroponic tomatoes. I want to do weed in pots then buckets in green house. I have a natural spring in my property and would love to use that water or that water threw the house drinking water filtration. The spring is high in iron I'm guessing? My question is what should I buy for water tester on budget. I bought basic top soil no miracle grow stuff. I guess basic info for dummies? I read your mixing your own nutrients post with that other guy and I was lost lol or if you've already done a post for dummies if you could direct me? This my first day
    Hey Sky, I should have said I already have a (expensive for what it is) Sentinel environmental controller. I would love to switch to a Pi when funds allow. I have temp and rH perfect after a week of fiddling. My A/C doesn't have a thermostat readout; it's just a knob.

    Adding CO2 is my next goal. Those controllers are pricey too. Have you worked on that? I know OpenAG uses off the shelf CO2 sensors, and I'm sure the code is available.
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