I have a 36 gallon bow front tank. I have always used gravel for my fish tank but decided to rebuild with sand as the substrate. so my question is how do i properly siphon the fish waste for the sand so know gas pockets can form? I also have about 8 live plants and a moss ball, and the tank is stocked at about a gallon bellow capacity with community fish. Would there be a special siphon i can purchase for sand?