I just got a 55gallon tank from a friend at work and i'm gathering all the stuff together to get it up and running. I have a question though, in the first couple weeks when i'm going to have to do 20% or more water changes, whats the best way to treat the water before i put it into my tank. A 20% water change is 11 gallons and that would be a huge container. I was thinking about a couple big 5 or 10 gallon unused gas tanks or something but i'm sure theres got to be a better way. Also how long after putting the water dechlorinater in does it take effect?