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Offlinetonyperez420
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Registered: 11/03/04
Posts: 1,234
Last seen: 11 years, 1 month
digital PH tester
    #5385561 - 03/10/06 01:12 PM (18 years, 23 days ago)

hello shroomery members,

I was wondering if anybody could suggest a good and accurate digital PH tester?
I know they could run pretty expensive, but I am looking to spend anywhere from $30-$100 greenbacks.
Could you be so kind as to point out where I can purchase it?
Does anyone of comments about the one sold on mycosupply?

I am pretty anal about things and would like to get my casings perfect. I dont mind spending the money for a digital one if its worth it.

thanx again shroomery

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Invisibleagar
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Registered: 11/21/04
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Re: digital PH tester [Re: tonyperez420]
    #5385574 - 03/10/06 01:18 PM (18 years, 23 days ago)

http://store.yahoo.com/cspoutdoors/kelwaysoilphd.html  :thumbup:

This model does only pH.

I use the next higher cost model.
Which does both pH & moisture%.
http://www.growersupply.com/kehbsote.html



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Offlinetonyperez420
Shaman Rasta

Registered: 11/03/04
Posts: 1,234
Last seen: 11 years, 1 month
Re: digital PH tester [Re: agar]
    #5385613 - 03/10/06 01:28 PM (18 years, 23 days ago)

wow I was I could do more then say the corny old thanx.... but

THANX!

ideal PH for casing is 6.5

what is ideal moisture?

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Invisibletiny_rabid_birds
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Re: digital PH tester [Re: tonyperez420]
    #5385636 - 03/10/06 01:33 PM (18 years, 23 days ago)

Quote:

tonyperez420 said:
ideal PH for casing is 7.5




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Invisibleagar
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Re: digital PH tester [Re: tonyperez420]
    #5385639 - 03/10/06 01:33 PM (18 years, 23 days ago)

Quote:

tonyperez420 said:
wow I was I could do more then say the corny old thanx.... but

THANX!

ideal PH for casing is 6.5

what is ideal moisture?




Ideal pH for casing is 7.5

Moisture content depends on which/what mix you use.

But, 68 to 74% is near optimal, with any mix.


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Offlinetonyperez420
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Registered: 11/03/04
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Last seen: 11 years, 1 month
Re: digital PH tester [Re: agar]
    #5385723 - 03/10/06 01:54 PM (18 years, 23 days ago)

shit thanx.....

68 to 74% moisture
7.5 PH level

One more question while Im on the topic...

Add limestone to increase PH
Add sulfur to decrease PH

I am guessing in this hobby you ONLY add limestone to increase, you dont want to go over, correct? ( I never heard of anybody adding sulfur to their casing)

Also, once the first flush is done I will use the digital PH tester to test level, the PH balance will change right?
If it goes down, I should simply sprinkle some limestone on the casing layer? (and mist it a little) Then test the PH again?
And if it goes up, add some sulfur???

I am just a student in this hobby and the technicalities are very interesting to me.... once I learn I will be sure to pass the knowledge on to others in this wonderful forum......

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Invisibleagar
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Re: digital PH tester [Re: tonyperez420]
    #5385783 - 03/10/06 02:11 PM (18 years, 23 days ago)

You add calcium carbonate to bring it UP.

So long as you don't go over 8.

You will never have to worry about bringing it down.

Sulfer would F/U the works.

Once you harvest a crop.
Patch casing with new casing mix & mist.


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OfflineLearning2Much
One Step @ aTime
Registered: 08/25/05
Posts: 86
Last seen: 17 years, 10 months
Re: digital PH tester [Re: agar]
    #5484793 - 04/05/06 10:02 PM (17 years, 11 months ago)

- What if you had your casing already made up and incubating and at a Ph level of 6.5

I understand it's not optimal but would it still work alright to get a decent flush?

If not, should I just mix in a tiny bit of hydrated lime for each container for the casings. At this point is sterilization of the lime important?

Kinda in a bind on this, and my PH tester was crap.

Thks

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OfflineBlue Helix
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Re: digital PH tester [Re: Learning2Much]
    #5484886 - 04/05/06 10:27 PM (17 years, 11 months ago)

Regular calcium carbonate cannot raise the pH of a casing above 8.3 regardless of how much is added or how fine the powder is. Under MOST circumstances, calcium carbonate will hit the correct pH right on the nose given a reasonable guess of how much to use. Hydrated lime, on the other hand, shoots the casing pH to 12.5 in no time unless you are very careful with it. It also fails to buffer the soil well in the long run, so a calcium carbonate source should always be added to a casing that is intended for many flushes.

Learning2Much, 6.5 is bad but it will work for a decent flush because cubes want to grow... BADLY. Most flushes in the grow logs aren't limited so much by pH but rather by many other mistakes made like moisture content or texture. Still to get a great flush, pH is key.

To correct pH, and that means bringing the pH up or more basic if you are using peat moss or coco coir, one should add calcium carbonate and the precise amount, as long as it is in the ball park, isn't important really. A cup or so per 10 cups of peat will do fine of the typical garden lime type. Maybe about half that if you are using tech grade calcium carbonate like used for wine making (which is much finer and reactive). If you use hydrated lime, I'd use no more than 1 teaspoon per 8 cups of peat moss (yeah you read that right 1 TEASPOON per 8 cups peat). RogerRabit has had success with using about ten times that amount, but my pH probe, a highly accurate and calibrated device, says it shouldn't work.

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