ph calibration

Kipn said:

i have them do you really use them. i dont trust them although i expect them to be right i find them too hard to determine between colors. i haven't done a grow relying on them but i have considered it. the ones i have show 7.0 6.0 and 5.0 pretty much the same color

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https://www.thomassci.com/scientific-supplies/Ph-Paper-6-8

Look at "short range" test papers. Screw meters.

hotrodharley said:

https://www.thomassci.com/scientific-supplies/Ph-Paper-6-8

Look at "short range" test papers. Screw meters.

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well since ive never read anything from you in posts that i disagree with i will put more trust in them. my guess is consistence is better then a few points difference

i have them but again i feel the colors are too close together and from a quick google search most seem to have that problem

does anyone know of any that have more distinct colors between each ph range

They make so many ranges it's incredible. Amazon will have them

hotrodharley said:

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They make so many ranges it's incredible. Amazon will have them

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i will have to try a few different ones then and see what i prefer

Kipn said:

hi people
so i was going to calibrate my ph meter its just one of them cheap $10 yallow meters and it came with powdered ph calibration 4.0 and 7.0 that is mixed with distilled water.

so my question is. do they work and are they accurate enough

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i have a cheap 10 yellow one seems to work for me i ditched the salts though and just got some calibration solution from Gh its like 20 dollars or so, leave youre pen in the calibrator when youre done with it keeps it from drying out which leads to loss of calibration and sometimes just a malfucntioning ph pen

hotrodharley said:

https://www.thomassci.com/scientific-supplies/Ph-Paper-6-8

Look at "short range" test papers. Screw meters.

Click to expand...

Thanks for this idea! I use Apera meters and they're basically flawless but they're also 43 bucks and up!!! ..so thanks again for this

Kipn said:

does anyone know if that pre mixed ph calibration solution is better then them powdered packs. is it all the same stuff

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Pre-mixed will be precise, powdered will be as precise as you make it depending on how accurately you measure. So if you take your time & have good measure volumes precisely it's a great savings. Even more if you just buy the base chemicals.