How long is salterwater safe to use...

[ocd_mariner]

in a covered rubbermaid container with powerheads constantly circulating water?

[PUGroyale]

No idea w/PH's... FWIW I've had mixed water sit for a week in covered 5g buckets before using it without any problem. hth...

[Angela Short]

I think as long as its circulating and not sitting going stagnent it would be fine. Many people keep a big tub mixed stirring at all times for emergencies.

[gflat65]

I'm only running a few 37 gallon totes right now, but I keep one full with RO/DI and one with NSW at all times. I sometimes skimp on waterchanges, so it may sit for a month (in Nashville, can't be that lazy here yet). I run a ph in each.