Question about pH pen storage solution.

[growsomebuds]

How long can I expect a 250ml bottle of storage solution to last? Is this something I'll have to buy 2x a year or more? Also, does my new TDS/EC meter require a solution for storage? If so, can I use this same solution?

https://www.amazon.com/gp/product/B0071AR9XI/ref=ox_sc_act_title_2?smid=A2HK45LS3HJODG&psc=1

Or, do I need another kind of solution for that, as well?

[Cloud]

storage solution should last at least a few years. Only need a few drops in the lid at a time. I put enough to cover diode nicely. Use storage solution for tds meter as well.

[growsomebuds]

storage solution should last at least a few years. Only need a few drops in the lid at a time. I put enough to cover diode nicely. Use storage solution for tds meter as well.

So, you just put enough in the pen's cap that it came with, and put it back on?

[Cloud]

yup pretty much man

[quirk]

I use this from Milwaukee Inst.(230ml) and refill cap w/ 3ml every 90 days. I did the math, I'll die before the bottle is empty.

[growsomebuds]

I use this from Milwaukee Inst.(230ml) and refill cap w/ 3ml every 90 days. I did the math, I'll die before the bottle is empty.

Nice kit there, sir.

[growsomebuds]

I use this from Milwaukee Inst.(230ml) and refill cap w/ 3ml every 90 days. I did the math, I'll die before the bottle is empty.

I'm shopping for a new pen. What's yours?

[quirk]

Apera PH 60

[growsomebuds]

Thanks for the help, fellas. You're helping me to make better decisions.