Ammonium Sulfate

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Originally Posted by Treetops

Could you please advise a PH Calibration mix of home products that one can put together..Just got the unit, and would like to make sure its right on..
Thanks.

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Not sure here...what is it that you are trying to accomplish? I believe that ph scale is from 1 up to 14 with 1 being acidic and 14 being base. :thumbsup:

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Originally Posted by stinkyattic

Tomatoes, yay!
I'll betcha you planted a determinate variety. They grow to a certain height, produce a single crop, and die. This is normal.
.

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I planted seeds from the Romano variety. I have no idea what they are supposed to do although I think I do still have the seed packet so I might have to just go and take a look see. I was hoping to have some nice plump luschous toms. I am going to remain hopful.;)

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Originally Posted by gotmeabigwave

Not sure here...what is it that you are trying to accomplish? I believe that ph scale is from 1 up to 14 with 1 being acidic and 14 being base. :thumbsup:

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What treetops is asking is whether there is a substance that you can find in your home that you can use to check whether your pH meter is functioning properly.

And you must have been paying attention in class! ; )