I just went out to pool and decided to look at the old sand that came out of my filter, and the new sand that had blown out the backwash pipe when I first put it in, the new sand was alot finer was no where the size of the old sand that came out. Think I will empty the sand filter and double check the laterals and again replace the sand, this time with pool store sand and not pool filter sand from home depot. I know the pump is to big for my filter but this has to help I think lol