Dolphin Cleaners 9991459-ASSY Spring Filter Basket for use with Dolphin™ Robotic Pool Cleaners. The Spring Filter Basket is for use with Dolphin™ Robotic Pool Cleaners. Dolphin Cleaners are easy to operate with easy filter emptying and cleaning. The replacement filter basket works with Dolphin S50 Poolcorp, Dolphin E-10, Dolphin Saturn, Dolphin Active 10, Dolphin Caymen, Dolphin Echo, Dolphin Escape, Dolphin Encore, and Pentair Prowler 910.