Hi, The subject tells everything. I'm just curious who does it how! Do you guys age your water? If yes for how long? I age 40 litres for a few days in a big plastic bin. When I fill it up(usually on friday afternoons) I add some Tetra Aquasafe and keep it circulating until sunday. When the day comes I add the TPN+ to it and just pump the water into my Rio 180. So far this is the best I could work out. I find the bucket system too messy and wet! So who does it how?