Water gardens are great but Mosquitoes like them too. To help control Mosquitoes a safe and effective remedy is Mosquito dunks. When placed in the water they are attractive to Mosquitoes, but they contain a bacteria. The Mosquitoes feed on it, it gets into their gut and kills them. The dunk is safe for pets, for fish that might be in the water, for wildlife and for humans. Just leave the dunks in the water, they will last about 30 days in a pond this size. Normally use 1 in 100 square feet or they could be broken up for use in birdbaths or pottery, anywhere there might be standing water where Mosquitoes will be breeding. It's a safe and effective way to enjoy a water garden without pesky Mosquitoes.