Hi guys and gals, first post. I have a little spot on one of my leaves, what could it be?

[SweetSkunk]

Edit:

Do you happen to know if you can calibrate/store this with distilled water? or is it best to buy a pH calibration solution

 

[Mr Green Fingers]

Edit:

Do you happen to know if you can calibrate/store this with distilled water? or is it best to buy a pH calibration solution

You will need to buy buffer 7 solution to callobrate it with, I think it does come with a little pouch of it to calibrate it for first use, I use storage solution to store store the meter but I have heard people just use water but you definitely don't want to let the electrode dry out as I found out the hard way lol

 

[Waira]

..you need the proper storage solution, it's critical to the functioning of the electrode,..... Hanna, HM, Blue Labs, for starters,.. might depend on where you live too,... pH meters are complex sensitive instruments, they need to be treated it! Read the Instructions by the makes, and/or go to their website for detailed info about how to care ofr it.. it will last for years if dealt with properly,.. I like to use both 7.0 and 4.0 calibration solutions, but that will depend on the model and maker as well,....
I take it you in EU or UK? Then you may not have the self-fill water machines at grocery stores, but they offer plenty low ppm water for cheap vs buying it retail,...

 

[SweetSkunk]

..you need the proper storage solution, it's critical to the functioning of the electrode,..... Hanna, HM, Blue Labs, for starters,.. might depend on where you live too,... pH meters are complex sensitive instruments, they need to be treated it! Read the Instructions by the makes, and/or go to their website for detailed info about how to care ofr it.. it will last for years if dealt with properly,.. I like to use both 7.0 and 4.0 calibration solutions, but that will depend on the model and maker as well,....
I take it you in EU or UK? Then you may not have the self-fill water machines at grocery stores, but they offer plenty low ppm water for cheap vs buying it retail,...

She's in! Just got to get my pH probes and testers ready for the next run