This Kidney shaped 2300 gal. liner pond includes three filters, 40 watt UV sterilizer, two jets and a skimmer. The heart of this pond is the 3,500 gph Sequence pump that supplies the two tier waterfall and the otter-spitter. The koi in this pond range from 6” to 24”. This pond replace a small goldfish pond. “I enjoy the koi more that the goldfish,” said Edna, “They have such a friendly temperament and this larger pond affords me more viewing pleasure