When changing the water in the tank you can use ordinary tap water but make sure to let the water age for a day or so to allow the chlorine dissipate. If you cannot drink your tap water then bottle water is recommended.
It is a good idea to add some water conditioner. Water conditioners such as the Aqua pharmaceutical stress conditioner can help neutralize chlorine. Others can help neutralize ammonia as well as adjust and maintain the pH level in your Beta tank. This will ensure the water quality and reduce the stress on your Beta fish or Betta fish.
It is also a good idea to let the Beta fish or Betta Fish remain inside the tank while the water is being changed. You can do this by dipping off a quarter of the water every day until it is gone and can be refilled. Pour the water slowly and ensure the water you add to the beta's bowl or tank is of the same temperature as the water removed. (usually room temp).
New Tanks and Beta Fish
New Tanks' often have a Break-in Period.
When you decorate your new tank and add the water the filter is not ready for a full tank of fish yet. The filter is running and moving the water and cleaning out dirt.
An aquarium filter such as the will remove the larger visible stuff and will also remove the dissolved fish waste that turns into ammonia in the water. However, in order for your fish to remain healthy special bacteria must grow in the filter system and on the particles of gravel in the bottom of your tank. This process occurs even on a limited scale in little fish bowls that have no filter in them.
It is best to start off with one or two other fish in a tank for the first 6-8 weeks. The needed bacteria cannot grow without fish in the tank.
Avoid changing the filter pads during break-in. This removes the bacterial colonies that are essential to a balanced aquarium. You can rinse the filter pad out in a container of aquarium water. This will preserve most of the bacteria colonies while still allowing your filter to flow freely.
After about 6-8 weeks you can keep the other fish and add your Beta, or remove them first. This process will undoubtedly help your Beta fish have a longer, healthier, and happier life. Most Betas can llive for 2 to 3 years in a prpperly cared for fish bowl or tank.