Sand Dollar® Top Mount Filters are the perfect high performance sand filters. It's incredibly simple to operate and maintain, and it's built with long-term reliability in mind. Plus, its highly efficient design provides all the clean, crystal clear water your pool requires, year after year.Now Available with ClearPro Technology® for 60% Cleaner WaterSand Dollar® Top Mount Filters with ClearPro Technology®, remove particles up to five times smaller than traditional sand filters well below what your eye can detect for water that truly sparkles with clarity. The ClearPro secret is a proprietary, porous tube that water must pass through before re-entering the pool. It creates a final barrier to the very smallest particles that sand cannot trap, including the finest dust particles, algae and pollens.