Water change in a 2.5 gallon tank?

[DiverBettaDoll]

I just set-up my first betta's new tank, an Aqueon MiniBow 2.5, which comes with a filter. I was wondering how often I need to change his water, and how much, since I've seen that some people only do 25-50% water changes but some people change it all.
I'm new to this, so any help would be appreciated :)
Thanks!

[aokashi]

I just topped off mine after 6 weeks :O
Lolol
But for a new tank...one 50% and one 100% in a week is the standard. (ie 50% change on wednesdays and 100% change on sundays)
Thia helps keep ammonia down at a nice low level.
Those that do 25% weekly have cycled tanks, (which requires a filter) or may have Natural Planted Tanks, where the plants acts as filter.

[DiverBettaDoll]

Thank you!
And I know this is such a beginner question, but when doing a 100% water change, I need to already have the water ready & conditioned beforehand, right? And then I can just put him back in?

[Pogthefish]

Yep! You can get it ready afterwards though, just make sure to add conditioner before adding the betta to the tank

[Perseusmom]

Try and get the temp of the water change the same or close as possible to the temp of the water he is in. 76-78 is a very good water temp.