Eshopps S-200 protein skimmer is designed for aquariums ranging from 120 to 260 gallons (450-1040 liters). It features a 7-inch diameter body, a Sicce PSK-1000 pump, and a footprint of 7 x 9 inches. The skimmer requires a water level between 7 and 9 inches. Pump need to change.