First of all let me tell you there is no golden rule of how often you change the water in your betta’s tank.
How often you do betta water change depended on what food you feed and how often you feed your betta.
• You should know that feeding flakes will cloud water faster,
• Feeding pallets can help prolong clean water condition longer
• Feeding live food has it’s benefits and danger.
If you truly desire feeding your fish live food go with the dried worms.
You should decide when a proper water change is needed by paying close attention to the water condition. Changing your water too often can harm your betta as well. Harmful chemical in tap water has an effect to slow your betta’s metabolism and immune system. Adding water conditions each time at water change neutralize chlorine, but what you really doing is taking one chemical out by adding another one in.
If you fail to notice a betta water change and let wasted build up over time, your betta is on a one way ticket to catching harmful betta disease.
Signs to look for that will indicate you to do a betta water change are simple to detect. Observed for thick surface water, cloudiness of water, change in water color, algae growth, and most import do not let fish wasted build up.
A proper way to do betta water change is by letting tap water sit over night in a clean bottle at room temperature.
Pour your fish into a clean bowl or cup along with the old water as gently as you can. Avoid touching your betta when transferring, keep in mind a slight contact with your hand may injured the fish without you knowing.
Clean the betta tank with warm water, use a scrubber if you need to but never use soap or chemicals in the cleaning process.
Use a fish net to drain the old water from the bowl and your betta should automatically get caught in the net. Carefully transferred your betta back into the betta tank.
If you need to do a betta water change but have not set aside tap water, change only 25-35 percent of the water in the betta tank. Use a siphon to suck as much waste build up from the bottom as you can. Add tap water back into the betta tank as needed.