This year, I purchases a mesh laundry bag and put my filter media inside it. I then tied the strings to the tub. Last summer, my DH made our version of s Skippy Filter out of a tub eh bought @ Walmart. I believe it is the type they use on farms w rope handles on each side. He made the aparatus for inside and assembled it while I was out of town. I had already gathered those nylon scrubbies and scrubbing pads. Occasionally, during heavy rain, the tub would overflow and filter media would escape so when I found the nylon mesh laundry bag, we decided to try it. So far, so good! We really need something bigger though, but he is currently working out-of-town so we will have to do with what we have. Unfortunately, the Green Frog does not like the filter system so he moved to the other side of the pond. I am sure he is w8ing for floating plants and floating pots to settle onto.