I would love to know more on your 55 gallon barrel filters. Like the tubing and the bottle caps. I have 5 of those we will be installing on our pond I have some filter media and a friend in KY thats gonna send more but I would like to make a few like what you have. Also I plan on putting ball valves on the bottom of mine so that I can drain them easier for cleaning.One more question did you put your pump before the barrels of after the barrels?