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I have to leave my betta fish alone for 10 days, what can I do for him to make sure he is okay while I'm gone? He has a filtered 3 gallon tank
How often should I change his water before I leave?
It's recommended to do a partial water change (about 25%) once a week for a 3 gallon tank. So, if you're leaving for 10 days, it might be a good idea to do a partial water change right before you leave to ensure the water quality is good for your fish.