Okay, so the dumbest question ever....

[linda lee]

This ended up being an extremely helpful thread for me.

Thanks, all.

 

[roland jacques]

chicagoman_35;107543 wrote: FYI,
Aging the mixed salt water is primarily to raise the oxegen content to enable the PH to adjust to proper levels. If the content is too low the ph drops, this could cause issues with sensitive creatures. That said, if the volume changed is small (5-10%) this prolly won't be an issue. I personally perform larger volume changes
like 25-30% at a time and prefer not to risk it...

That makes since to me.
I heard about the caustic effects of freshly mixed saltwater was from a importer/Marine biologist guy. He was talking about the burning of the gills of fish. I'm not sure if this was his opinion or if their was some science to back that up. It easy enough just to stay on the safe side of this issue. Ill look into this a little more.

Xyzpdq0121
Thanks for that info thats good to know.