Fresh water for Goldie and Nemo

Do you remember how we need to change one third of the water in the fish tank every week? The water we need to put into the tank after we have taken out one third needs to be fresh water.
It occurred to me as I shoveled and swept this afternoon that what I was shoveling was frozen, fresh water!

I decided to scoop up some very clean snow in a jug. Now I'm waiting for it to melt so I can tip it into the clean milk bottle. Maybe you could gather some fresh water for Goldie and Nemo too.