Leftover salt water mix anygood?

[jroescher]

I was considering putting a tank inside a cabinet to mix RO and salt for water changes. About 10 gallons. When pumped or drained, it would leave about an inch or two of mixed water in the bottom.

Would this water be okay if left until the next batch is made? It would get very little, if any light or air to contaminate it.

It would be a hassle to pull the tank out of the cabinet to pour out the bottom.

[GaryP]

Yes, it doesn't go "bad."

Gary

[astrong]

The salintiy of old salt water will increase as water evaporates from an open system. But if you thoroughly oxygenate, mix and test with a hydrometer before use, you shouldn't have a problem. I leave old water in sealed 5 gallon jugs for quite some time before using, no problems yet.