Drain the acid/water mix, refill with plain water, and dump in a box of baking soda. Run for 10 minutes or so, drain, flush with plain water, then refill with a 50/50 antifreeze mix. Make sure there aren't any tree huggers around when you dump the acid mix.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!