How To Change Water For Betta Fish Bowl. More frequent water changes will also help prevent algae blooms in your bowl. Pour water in bowl.
Fill your container with the amount of water needed and the required amount of aquarium treatment. Pour in my stored water in a bucket. We do water changes on all our betta tanks once a week.
Add this an your water conditioner drops and then acclimate the betta into the water slowly float in cup or bag allowing him to adjust to the new water and temperature.
A half-gallon bowl should be changed completely twice per week. We recently learned from a fish expert that we could have avoided this by adding bacteria into the water whenever we do a 100 water change. Treat water with dechlorinator. If you have a very small 1-pint jar this should be changed every day.