How often do I have to change the fishtank water?
I have 3 goldfish. My fish tank is 5 gallons. I change the water one a week. I take out the fish and put them in a big bowl. I pour out all the water in the tank and refill it. I do have a water pump and filter, and i put water conditioner in the new water. Am i changing the water correctly?
Goldfish can't live in a 5 gallon bowl - they'll outgrow it quickly (they grow up to a foot long), plus they're messy eaters and pooping machines. You can sort of, kind of, tentatively squeak one in a 10 gallon tank. So even if you do change the water correctly, they're not going to live long, let alone live happily.
To correctly change water, change out about 10 - 25% of the water once a week. If you change out all the water, you will kill off any beneficial bacteria that's trying to cultivate in your tank.
Seriously though. 3 goldfish shouldn't live in a 5 gallon tank.