Black Koi Water Features on Instagram: "This is a young recreation pond, and it is powered by a simple yet highly effective upflow bog filtration system. It was designed to be the ultimate outdoor space, with opportunities for fishing, swimming, hosting parties, and growing fish and plant. This one is uniquely large, likely being one of the largest recitation ponds on the east coast. As such, this one could even make a fun space for kayaking or canoeing around. We think it changes the energy of