So I am having a difficult time doing water changes in my 29 gallon fish tank. I use a siphon and a 5 gallon bucket and I can get some water out of the tank but I can't get any water back in. As much as I would love to be able to lift a 5 gallon bucket and pour it into the tank I can't. What do I do? I already completed one water change with help lifting the bucket but I can't keep asking for help. How do you people with bigger tanks then mine do this. I can't imagine.