We learned today from our pool service that our Sand Filter has a leak and will need to be replaced. We have only been in the home for a few weeks and the crack did not come up in our inspection. Our pool service company owner is coming over on monday to determine how bad the crack is and provide an estimate. This is a chorine only pool (no SWG). What can I do in the meantime to verify the leak, determine potential cost to replace or should I switch filter types (DE or cartridge)?