How do I change the betta fry's water?

Babies came up one day and I need to know if there's any possible way to change the water without harming them. The water is getting dirtier and I have no filter so is there advice I can get on what to do?How do I change the betta fry's water?Well, there is a little trick when raising fry. We dont remove water, we add it via a drip line made from a piece of airline. This is why a 10 gal is only half filled- to accomodate for the addition of the water. You can try removing the water with a piece of airline, just be prepared to go blind trying to spot betta babies in the waste bucket.