Thanks to everyone who offered help with my questions. You all seem to have so much experience and I'm new to this since last November.
We miss our first betta "Alfie", but decided to try again. We got a new 1 1/2 gallon tank and a new male. He has a pinkish/white body with blue fins. Very pretty. He has eaten a little, but is still settling in.
Then I got 3 females for the 5 gallon tank. I've been watching them closely and they all seem to be getting along so far. I'm so happy for that. We got a purple/blue one, a red one, and one that has a white body with red fins. So they look quite patriotic in the tank. They have many hiding places if needed, but so far they are doing great. They are so much different from the male. Our first betta wasn't a big eater. The females are very small, but they act like they would eat forever. I'm not feeding them much, but they are doing great with the eating. I'm even able to make sure that each one gets their fair share. They are very active and swim quite a bit.
They are doing okay with the filter, but are you able to keep fish in a 5 gallon unfiltered tank? I thought I read that some people do that. We have a heater too. If I decided to go without the filter, how often would I need to change the water?