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Caribou_Lou
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Registered: 10/17/07
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Calcium carbonate
#7548652 - 10/22/07 07:58 PM (16 years, 3 months ago) |
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I have gone to or called at least ten different hardware stores and nurseries, but none of them have limestone or any kind of calcium carbonate.. I even called a feed store but they only carry crushed oyster shells which I already have. I'd rather not buy it online because the shipping is so much. Is there any stores that will for sure have any kind of ph buffer? I did some searching and saw that chalk will work? Is this true, and where could I find it?
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mikeytro
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I bought mine online but I got straight calcium carbonate in powder form it was through an animal shop, had something to do with tortoises have you checked your local pet store?
-------------------- "Reality is merely an illusion, albeit a very persistent one." - Einstein
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Bikerfool
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Re: Calcium carbonate [Re: mikeytro]
#7548762 - 10/22/07 08:24 PM (16 years, 3 months ago) |
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Buy 5 lbs of hydrated lime online, it will last you forever. The shipping can't be that much, it's worth it. If you already have crushed oyster shells why do you need more calcium carbonate?
-------------------- Just an angsty teen contributing to the pubs decline with contentless posts.
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mikeytro
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Re: Calcium carbonate [Re: Bikerfool]
#7548795 - 10/22/07 08:28 PM (16 years, 3 months ago) |
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5 pounds?! damn I got a little bag of the stuff and only used like 5% thus far thats a shit load
-------------------- "Reality is merely an illusion, albeit a very persistent one." - Einstein
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RogerRabbit
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Re: Calcium carbonate [Re: mikeytro]
#7548961 - 10/22/07 08:56 PM (16 years, 3 months ago) |
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Quote:
If you already have crushed oyster shells why do you need more calcium carbonate?
While crushed oyster shells are calcium carbonate, they would take a year or more to have an effect on pH. Oyster shell flour would help sooner, but hydrated lime is my choice because it balances pH right away, which is when you need it most in mycology. RR
-------------------- Download Let's Grow Mushrooms semper in excretia sumus solim profundum variat "I've never had a failed experiment. I've only discovered 10,000 methods which do not work." Thomas Edison
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Caribou_Lou
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Yeah I didn't think about how long it would last since you only use a little bit, I'm going to buy 10 lbs for a little under $20 unless I can find it for cheaper. You're supposed to use about 10% by volume for the 50/50 casing?
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RogerRabbit
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No. With hydrated lime, roughly 1 teaspoon for each cup of peat. Use up to ten percent gypsum. RR
-------------------- Download Let's Grow Mushrooms semper in excretia sumus solim profundum variat "I've never had a failed experiment. I've only discovered 10,000 methods which do not work." Thomas Edison
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Caribou_Lou
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Oh wow, that will last forever then thanks!
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ShRm22
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Quote:
RogerRabbit said: No. With hydrated lime, roughly 1 teaspoon for each cup of peat. Use up to ten percent gypsum. RR
So the gypsum is taking place of the oyster shells in the 50/50+ tek? When you say up to ten percent, does that mean 10% of the peat or the casing mix? What are your exact measurements?
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mycocurious
Mike O. Kuerias



Registered: 02/09/07
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Re: Calcium carbonate [Re: ShRm22]
#7657092 - 11/19/07 10:49 PM (16 years, 2 months ago) |
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10% by volume...
--------------------
Don't mistake my tone for a "matter-of-fact" attitude. I'm just presenting what I believe to be correct, until I'm corrected... - How Myco-Curious Prepares Coir & Compost Substrates - How Myco-Curious Builds A Bulk Humidifier - How Myco-Curious Builds An Automated Greenhouse ------------------------------------ figgusfiddus said: Keep in mind that inoculating or whatever in front of a flow hood won't help your bad substrate, your bad inoculant, your bad sterile procedure, etc. etc. etc. It's not a +3 flowhood of magic, it's just a tool.
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zathan
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I had to order both hydrated lime and oyster shell flour from the internets. The amount of gasoline I've wasted just by driving around the philly region to find this stuff costs more than the shipping fees when I finally decided to go the online route.
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ShRm22
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volume of what ?
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Nibin
Getting there



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Re: Calcium carbonate [Re: ShRm22]
#7658887 - 11/20/07 12:25 PM (16 years, 2 months ago) |
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100% by volume is 1 part calcium carbonate for 10 of the other
-------------------- Newcomers guide-----> For all things shroomy
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RogerRabbit
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Re: Calcium carbonate [Re: Nibin]
#7658913 - 11/20/07 12:33 PM (16 years, 2 months ago) |
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One teaspoon of hydrated lime for each cup of peat moss. One cup of gypsum for each ten cups of peat moss. You don't count the vermiculite when making the calculations. RR
-------------------- Download Let's Grow Mushrooms semper in excretia sumus solim profundum variat "I've never had a failed experiment. I've only discovered 10,000 methods which do not work." Thomas Edison
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BUDDHA_702
Master Mycologist In Training



Registered: 02/17/07
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What if you have to use oyster shell flour or crushed oyster shells?
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gotxp
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Re: Calcium carbonate [Re: BUDDHA_702]
#7659704 - 11/20/07 04:40 PM (16 years, 2 months ago) |
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u can get them at pet stores (such as petsmart), they sell it in the reptile section as calcium sand (but if u read the side it says calcium carbonate)
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ShRm22
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Re: Calcium carbonate [Re: gotxp]
#7667399 - 11/22/07 03:58 PM (16 years, 2 months ago) |
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Alright well I am pretty confused with the calcium carbonate, gypsum, and crushed oyster shells. I am no sure which is used for what, what can be substituted with another and so on. From what I gathered from the board and readings, hydrated lime is a PH buffer on the peat. Now I am just confused on what calcium carbonate is and what the difference is between that and gypsum. Can they be substituted for each other? I am just trying to figure out all this information to get my casing layer materials ready.
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Nibin
Getting there



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Re: Calcium carbonate [Re: ShRm22]
#7667477 - 11/22/07 04:30 PM (16 years, 2 months ago) |
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Hydrated lime is a pH corrector. It increases pH greatly and fast but has no lasting effect.
Gypsum acts as a pH buffer, that is, it slowly decomposes when pH goes out of a certain range, bringing the pH back to that range (and that range is the one we want). It is also a supplement of magnesium and sulfur. Another use is as an anticlumping agent in grain.
Calcium Carbonate (which is also what oyster shell is made of) has the same buffering effects as gypsum. (if in oyster shell shape it has to be oyster shell flour)
-------------------- Newcomers guide-----> For all things shroomy
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ShRm22
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Re: Calcium carbonate [Re: Nibin]
#7667491 - 11/22/07 04:34 PM (16 years, 2 months ago) |
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Alright well thanks for clearing that up, so gypsum can be a substitute for calcium carbonate which is crushed oyster shells. So Hydrated lime is an instant PH correcter and the gypsum is a long time PH buffer. Alright well I am pretty sure that I got it all down now. Thanks for the help.
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