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Mushrooms, Mycology and Psychedelics > Mushroom Cultivation
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Can Potassium hydroxide be used instead of hydrated lime?
    #6427136 -

Can Potassium hydroxide be used to raise the pH of peat for a casing? 

I've been looking around for hydrated lime (calcium hydroxide) for a while now and haven't found it.  Finally I went to a hydroponic shop and they only carry Potassium Hydroxide for raising Ph.  I did a quick search on it to see what I could find out about it's usages.  Apparently one of it's uses is as a FUNGICIDE  :confused: but I don't know if that's only in high concentrations or something.

SECOND QUESTION:
I find it's a lot more difficult to find coco COIR than it is to find coco FIBER.  I know in the 60/40 tek by Roadkill he says to only use the coir.  But does that apply when using it to supplement bulk substrates?

Thanks in advance!


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Edited by musher_420 (01/05/07 08:50 AM)

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Re: Can Potassium hydroxide be used instead of hydrated lime? [Re: musher_420]
    #6427498 -

I have a bottle of potassium hydroxide, too. I was planning on raising pH of a coir/coffee substrate with it at hydration- I assume because of the low quantities that would be used to tune-in pH it wouldn't interfere with anything.

But it would still be good to get the go-ahead from someone who's tried it, or knows what it'll do.

Also, any petsmart'll have bricks of coir.


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Re: Can Potassium hydroxide be used instead of hydrated lime? [Re: Hypercube]
    #6427559 -

I'm glad to see I'm not the only one in this boat. I'm actually surprised I haven't got an answer from someone who has tried it before yet. I know you can't have high concentrations of magnesium in a casing mix, but that's about it.

The checked the largest petsmart in the area. This place is huge. They don't have bricks of coir. Only bricks of coco fiber. I know a place with coir but it's not convenient where as coco fiber is more easily available to me.


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My Humidifier Reservoir Expansion Tek

Must read links for beginners

Btw- You are not what you own!

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Re: Can Potassium hydroxide be used instead of hydrated lime? [Re: musher_420]
    #6427649 -

Potassium hydroxide is lethal to fungi. It's also a corrosive chemical agent. Potassium is not a major nutrient for fungi the way it is for plants. Use calcium hydroxide or calcium carbonate for pH control.
RR


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Re: Can Potassium hydroxide be used instead of hydrated lime? [Re: RogerRabbit]
    #6427752 -

Thanks RR.


--------------------
My Humidifier Reservoir Expansion Tek

Must read links for beginners

Btw- You are not what you own!

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Re: Can Potassium hydroxide be used instead of hydrated lime? [Re: RogerRabbit]
    #6427827 -

I see that hydrated lime also has quite a few other uses. Seeing as I've been unsuccessful at finding hydrated lime at nurseries or hydro shops. Do you know any other sources for hydrated lime? I see it's used for motor and plaster do you think I could find it at home depot or something? Would you happen to know of any specific brands that would work?

Thanks again.


--------------------
My Humidifier Reservoir Expansion Tek

Must read links for beginners

Btw- You are not what you own!

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Re: Can Potassium hydroxide be used instead of hydrated lime? [Re: RogerRabbit]
    #6427831 -

Just for reference:

Calcium hydroxide is also classified as a corrosive chemical. It's a medium-strength base as opposed to potassium hydroxide, which is a strong base. Both will happily ruin your day (or month, or life) if you get any amount in your eyes, though.

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Re: Can Potassium hydroxide be used instead of hydrated lime? [Re: Sillicybin]
    #6427846 -

I'll keep that in mind....I'm more worried about harming my mushrooms then my eyes though. :smirk:


--------------------
My Humidifier Reservoir Expansion Tek

Must read links for beginners

Btw- You are not what you own!

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Mushrooms, Mycology and Psychedelics > Mushroom Cultivation
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