Gonna run this one off of the filter. Which of course opens up the possibility or getting fish/shrimp nasties above ground where the frogs are. And while i believe they should be good, but just in case, i'm going to have a bit of lava rock in the aquatic section for good bacteria to grow on. Add that to the extra filtration i get from the plants and that water will be cleaner that what comes out of my tap......lol