Just a question for those who do this already: how long before the mixtures go bad?
I mean, sometimes, after a while, I see gunky stuff in my mixtures, which I can only assume are precipitates. I also assume that's not good, so I throw it out and make a new one.
I used to make strong mixtures, so that I only have to squirt 1 mL per day, but it makes the mixture last too long, and I end up having to throw some of it away. I think I'll have to make more dilute mixtures, and squirt like 5 mL-10mL a day.
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