New Grower Ph probe storage solution

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What else besides expensive storage solution can i store my blue lab ph pen and Milwaukee ph meter in?
 
Really? The blue lab solution for a bottle is $8....

Im on my first one and have had my blue labs pen for 3 years

Couple drops to keep the probe wet is all you need. You can always use water in a solo cup, better that letting the probes dry out completely but you'll likely have to calibrate more often, spending more money on calibration fluids in the long run lol. Just my two cents anyways.

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http://forum.grasscity.com/index.php?/topic/1348058-DaS-Perpetual-Stealth-Cabs-Grow-Chronicles
 
Thats a good deal on that solution. Everywhere ive looked is 15 min. But if you only need a few drops thats awesome. Just enough to keep that sponge wet right?
 
So as long as the sponge is wet i should be fine? How often do you guys recalibrate?
I store my Milwakee PH pen in regular water. I calibrate every 6-8 weeks. I buy the calibration solution packets on ebay for about $1.75 (USD) each and buy about 10 at a time...
 
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