I have two bettas, each in a 2.5 ga minibow. I currently do weekly 100% water changes, which is stressful for me and the guys, also i know i shoud probably do it more frequently. I'm also having issues maintaining a consistent temp for them. They have heaters (I forget the brand) but they're not adjustable and one broke after two weeks. I live in a tiny apartment and temperature fluctuations are an issue, especially with the crazy NY weather.
I would like to do weekly water changes where I can keep the guys in their tanks. Which tank size would you recommend? I don't really have a strict budget and to be honest, space is more of a consideration than money. I'm happy to spend on quality equipment if it's worth it. Currently they live on a white Ikea bookcase and I'd like to keep them in the same area. Surface spaces a major issue for us.
My building is unheated during weekdays in winter (joys of co-op living), so I need to prepare for that. Internal temps get to low 60s, but as high as 80 when the heat kicks in
Thanks for your recommendations and advice.