First of all congratulations on your new betta! I think you will enjoy him a lot. Bettas are very personable and entertaining when they are properly taken care of!
For feeding it is not recommended to feed and freezedried foods as the main source of food. Freezedried foods can very easily cause constipation and swim bladder issues, and should only be used as an occasional snack. Its best to feed a betta specific pellet daily, the best pellet out there is the Hikari Betta Bio-Gold. I feed all of my guys about 6 pellets a day, 3 in the morning and 3 at night. every 3 days then get a snack of thawed bloodworms, and they are fasted once a week.
You boy will be thrilled with a 10 gallon tank! Wait till you see his personality blossom! I would suspect that the filter that comes with the 10g kit is probably too strong, but try it and see.
As for changing the water simply net your fish into a small container (tupperware or something) filled with water from his vase. Clean the vase well, rinse the gravel and add fresh water, don't forget to add water conditioner!
Good luck and if you have anymore questions dont hesitate to ask!
Originally Posted by Kittles
I've only heard negative things about Bettafix, or any Betta___ product, really. I don't remember why, just that they contained something potentially hazardous. Maybe it's just me, but it also seems unnecessary. I mean, isn't Bettafix a medication?
Bettafix is simply a weakened form of melafix to make it more "Betta safe" It can be fine in very moderate doses, but too much can kill a betta. I never use it, it makes me nervous.