When choosing your water conditioner, you want to choose a brand that makes it easy to measure or dispense the does you will need for your tank. Being the biggest bottle to save money may not be the best way to go. Especially if you can not get the exact dose
Follow The Directions On Your Product Carefully.
There are many other water conditioners on the market to choose from. They are all just as good as the next. Some of them have the extra functions and some of them do not. Choose the one that is best for your tank, your betta fish, and their needs.