It features a nine-watt UV clarifier that eliminates water discoloration and comes with Zeolite crystals which make the pond far more hospitable for koi along with other fish. There are 3 fountain styles (tier, jet, and bell) supplying a spread of different aesthetics. This tiny pond is edged with pebbles https://www.amazon.com.br/gp/product/B0D5BZZZ7K