whats the difference between this and their GroLine storage solution?

I use Skunk Labs Potassium Chloride solution . it's cheaper

After a few days, the solution becomes crystallized and chunky. What am I doing wrong?

Not sure. Mine lasted for weeks and only became crystallized of left uncapped or in the open air . Cld be bad to begin with if only a cpl days . Try gettin a refund or a new order and see what happens ..

How much of this are we supposed to use on the ORP meter tip? Just pour some into the basin that the tip slides into?

Well Hanna says not to store the unit in that cap for what reason idk at least on my ph 55 meter but I use those packets it comes with to store it in and use just enuff to cover the electrode then change it once a week or so not sure what ph meter u have but you could most likely use the cap I used it on the last unit I owned so ur call

This is probably an obvious answer but I thought I'd be careful; Can this storage solution be used for an Oakton pH meter? This is way cheaper.

I'm sure its universal just one thing when I used it, it got crusty on me so I just use ph 4 or 7 solution to store mine in and use the cleanin solution once a week on it is all but it would work for your meter if you wanna try it out for yourself and see.

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⚡ Keep your pH game sharp and sustainable!

GENEROUS 500 ML VOLUME - Ample storage to maintain electrode longevity without frequent refills.
LIGHTWEIGHT PORTABLE - At just 500g, easy to carry and store in any professional lab or field kit.
OPTIMAL P H PRESERVATION - Keeps your electrodes calibrated and ready with a scientifically balanced solution.
UNIVERSAL COMPATIBILITY - Designed specifically for Hanna Instruments pH electrodes, ensuring perfect fit and performance.
ECO CONSCIOUS COMPOSITION - Crafted from polyethylene and polylactic acid for sustainable lab practices.

The Hanna Instruments HI-70300L is a 500ml pH electrode storage solution formulated to maintain electrode accuracy and extend lifespan. Made from eco-friendly PE and PLA materials, it offers a perfect balance of performance and sustainability for professional labs and fieldwork.

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Manufacturer	HANNA INSTRUMENTS
Part number	HI70300L
Item Weight	500 g
Product Dimensions	127 x 127 x 127 cm; 500 g
Item model number	HI 70300L
Material	PE_(Polyethylene), PLA_(Polylactic_Acid), Plastic
Item Package Quantity	1
Included components	500ml of storage solution
Batteries included?	No
Batteries Required?	No

Hanna Instruments HI-70300L pH Electrode Storage Solution, 500ml

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