Thanks so much. I will try that. Followup question regarding backwashing and chemicals.
After I backwash, all I need to do is add the DE, right? I have been adding 6 scoops each time I do that. Is that too much? Too little? The pool is about 30000 gallon SWG.
Also, all I add to the pool is acid, salt, the purple stuff and shock. Should I be adding anything else? I'm in Houston, so it gets hot and humid. Pool was built in December 07. I am afraid of all the horror stories about algae I've read, but I also don't want to be adding thousands of chemicals that all just might balance each other out (or do more harm than good...).
Thanks again for any assistance,
Phil