Hopefully I'm in the right section in posting this so with that..... For over 12 years, I had a 27' above ground with DE filter in NH, Never had any issues and now that we moved (2014) to SC, we got a 16x32 inground with a sand filter and not very happy. I keep having dirt (Dark brown in color) the next day after cleaning the pool. I would than put my pool rover that I had for my above ground (It does good) to clean it back up and the next day again brown dirt on the bottom. It is Dirt, It's grainy when I inspect it in my pool rover bag. Soooo, does that mean the filter may not have enough sand in it and allowing the dirt back into the pool? I bought some unions yesterday so I'm about to cut the pipes and open up the filter, empty it, clean it, and put new sand in it unless you (the Pro's) think it's a waste of time.