Thanks Matt, I hooked a Magnum 350 running carbon up to the tub, stirred up the water, let it filter for about 14 hours, (while stirring up the water) and then removed the filter, put on a new filter sleeve and exchanged the carbon. I plan on doing this a couple more times. I have 10 gallons ready to go for a water change today. The tub is on my back porch, it gets full sun (western exposure) in the afternoon/evenings) I will also put some old aquarium lights up for it if need be. Can't wait to get it in the tank. (But I will!)