hi everyone

my female betta is residing in a 4 gallon heated tank and i wanted to know if she really needs to have the filter or not.
its only an air driven sponge filter but it takes up a bit of room and i do a weekly half change on her water.

so, should it stay or can it go, thanks

With my betta without a filter, I do 100% water changes. Mine is in a 2 gallon tank. What I would try, is to keep an eye on the ammonia levels the first few weeks without the filter, and see how much water you would have to change. My betta in the unfiltered tank has done really well, BTW.

Oh, the other thing, is that I make sure I age the water at least 24 hours before the water change, since my water comes out of the tap at a lower ph. When I didn't age the water, my poor betta got holes in his fins , but once I made sure to use aged water, his fins have been perfect

My Betta is in a 5 gallon and i do 50% water changes each week.
I don't have a filter or Bubble bar because my betta gets stressed out
with the currents even if it's rather low. He does alot better without
the filter.

I have my betta in an unfiltered 5.5 gallon, and have to change most of the water every 3-4 days. I've had him in it for a year and a half, and he's been fine, except for some persistant tail rot, but healthy and lively. His water becomes cloudy too quickly, though. I think I'm going to use my filter when I get it all cleaned up and see if things get any easier.

I'd keep the filter, personally.

If you are worried about it making the water choppy, there are a few gizmos out there for keeping the surface undisturbed (or you can make your own)

A plant in front of the filter will help keep currents down too

hi sandy! id say to keep the pump in there for circualtion if nothing else. as the tank is heated, you dont want just one end of the tank to get warm. i experimented with that for a while but they were getting stress with the constant temperature changes when they went from one end of the tank to another. it would be ok in a warm room without a heater though.

good point amy thanks. well, after deliberation and cogitation i've decided to keep it in to keep the water moving around. The current it has is practically 0 really and doesnt bother her so thanks everyone for the input.

That's something to think about!
I've never used a filter until about six mos ago. Hmmm I think I honestly can't see a difference.