Water changes... what are water changes?

I admit, when I only had a couple of fish and my bio-load was way low... water changes came as common as a lunar eclipse. However, having recently added a couple more to my list, I now do them about once a week. If you cringe when hearing the phrase "water change" but like your fish and your investment, then this picture is for you. Can you see which one of three buckets below is used water?


This is your water in five gallon buckets.

This is your water after your fish have peed and poo'ed in it.



Any questions?