Crystal Pool (PVT) Ltd. Sangabo Mawatha, Anuradhapura 0716552500 crystalpool.lk Sand filters are cleaned by backwashing, which will involve reversing the h2o stream throughout the filter, and flushing the soiled drinking water right into a waste line. Concrete pools are actually custom-crafted, and might be shaped to pretty much any https://directoryark.com/listings12791725/swimming-pool-construction-cost-in-sri-lanka-can-be-fun-for-anyone