Hello. I have had two betta fish. One lived about a year, the next one lived almost two years. My last aquarium was about two gallons, heater, no filter, and I changed the water 50%, twice a week.
My last betta fish seemed to have some kind of fungus disease when he recently passed away,

so I'm planning to play it safe and buy a whole new setup.
I want to set up an aquarium that will be the best for the new betta fish I'm planning to get. I'd like to keep him happy and healthy for as long as possible, up to his maximum life span if possible.
From what I've been reading on this site, I should get a somewhat larger tank, with a filter and a heater. Does anyone know of a good online source where I could buy everything at once? Aquarium, filter, heater, all at one time? If I could find a good combination of equipment already set up specifically for a betta fish, I believe I'd have more chance of success, less chance of making a mistake in what I buy.
Thanks.