Before Atlantic Pool Leak Detection professionals arrive to investigate your potential pool leak, you should first vacuum the pool. Dirt can cover even the smallest of leaks, so having a clean pool is a good start to ensure that any and all leaks can be detected.  Make sure the water is clean and clear so that testing is effective.  If it is not, the water could contain molds, fungus, larvae, algae, and other contaminants that could make you sick, besides making it almost impossible to test.