I mix 25 gallon batches of salt H20 whenever I do a water change. I use rodi water, then throw a maxijet in the bottom of the "garbage can" (which is actually a white, food-safe container with handles and lid from a wine making store).
I've leave the water stirring for a day or two before putting it in the tank in two batches (one day after the other).
I wouldn't leave 'fresh' salt water to sit for more than a week -- at the most. Speaking just personally, what's the point of ro/di water if we let it degrade before using it?
Erik
NB: for my water topoff water (also rodi in a 5gallon foodsafe bucket) I leave an air bubbler in the base of it to provide some water circulation. This water lasts about a week as well.
|