I would like to build a filtering system that I could hook up inline with a garden hose and be able to add water directly to my tank. I currently have a powerhead hooked up to a garden hose, I pump water out of the tank, then fill a trash can, declorinate, then pump back in. Not too bad but still alot of work(I change 200 gallons at a time). I would like to make it even easier so that I could do it at night after work etc. Currently I only change water every 3-4 weeks due to my busy schedule (takes a couple hours) but would like to do it weekly. Is there something I could build to do this, lets say from home depot? Money is not really an issue, but cheaper is always better.