Hey, fun thread! Question is can you mix up a month or 2 worth of water change water to have on hand so you don't have to mix a gallon at a time? Sure, can't see why not. I've stored IO and Kent salt in 5g jugs for over a month, no problems at all. I regularly have a rubbermaid of SW made at any time, usually two weeks old anyway.
To store salt water, fill a jug, put the lid on it, and keep it in the dark until you need it. You shouldn't have any nitrates or brown water. This assumes you're using RO and quality salt. If either of these isn't the case, change it.
You should have no trouble keeping 10g of SW handy over a span of 2 months....
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Brad
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