Is there any type of Acid (pH minus) feeders that can be used with chlorine generators in salt water pools to keep the pH near where it should be. I was thinking something like the in-line or floating chlorine feeder style. Just something to add nearly the right amount of acid to keep the pool near balance until it could be checked. Like to use while on vacation or all the time for that matter. The pool installer was offering me this multi $1000 dollar electronic contraption to control the chlorine and pH but that is not what I am looking for. I just want something simple and cheap to dribble a little acid in all the time that could be adjusted as needed to find the sweet spot.