I've read through alot of posts on this site where people were recomended by their "pool guy" to drain thier pool because it was getting out of control, only to see the advice of "don't listen" or "just add more bleach". these situations have sounded logical to me for the most part. my question is, is there a time when pool water should be changed as regular maintenance or for any other reason? my pool stays relatively clear for the most part, and runs away occasionally, but i figure this may be how my pool guy "takes care of it". he blames it on my water too, saying the total solids are too high to maintain efficiently. is this a bunch of cr@p? i don't mind changing it out if i need to, but i'm wondering when/if this point actually comes and whether or not most conditions are always "chemically reversible".