Sand filters (Media filters)
Sand filters (known also as media filters) work by passing water through sand or specialist filter media such as Diamond Kleen recycled glass media. This traps dirt and debris inside leaving only clean water to return to your pool. Periodically the filter can be "backwashed" to send the built up contaminants to waste.
Sand filters have traditionally been the most popular form of filter in Australia due to their durability and low maintenance requirements.