Sorry to post on your thread, question for Yexas Splash, I saw your post above, you mentions this: - Damage to, or separation of, internal parts (laterals, center stand pipe, etc) (Did you fill the filter halfway with water "before" adding the sand?) Are we suppose to fill the tank with water halfway? I'm new to this , this is why i ask. I noticed some sand in my pool, not much but still noticeable.