Do78521

PPS PRO - Is it possible for macro and micro to go bad? usually how long can you keep them until they go bad? What are some of the signs to look for?

JeffyFunk

Macro solutions - Normally stable and do not go bad. Can be preserved w/ ~5% Excel.

Micro solutions - More unstable (due to the intrinsic nature of Fe). Store in the dark or refrigerate. Can be preserved w/ ~5% Excel. If micro solutions go bad, it's usually due to mold / fungus growing in solution.

All solutions can (eventually) support algae growth so checking for algae or growth in the solutions bottles periodically is a good idea. This is also why the addition of Excel is a good idea.

Do78521

so if there are no fungus growth noted in the solution or odd smell... the solution should be ok to use?

JeffyFunk

yes, they should be good. Another thing i forgot to mention - the solutions should not have any precipitates after they are made up. if you see anything precipitate out of solution after they are made, be sure to give them a good shake to bring everything back into solution...

Do78521

thanks for the info jeffy