Aqua Excel - External Skimmer Model 3 Aqua Excel Sale! from 30999 /per Qty. Add to Cart This item is currently on backorder but you can still purchase it now and we'll ship as soon as more become available. AE - External 3 via aqua 2600, 45 watts 14" x 9.5" x 21.25" rated up to 450 gal