[How to switch filters?]

I have a 10 gallon planted rimless Betta tank and am currently running Fluval double sponge filter in it. I also have a 5 gallon with Aquarium Coop nano sponge filter in it. I love the filter so much I ordered a small Coop sponge filter and want to get rid of the double fluvial sponge. Can I remove it and add the new filter without crashing my tank? Please advise as how to switch over

Thanks

Jackie

[Nano sponge fiter]

I just received my new nano sponge filter and ziss ayirstone. I tightened the ayirstone to make bubbles smaller for my Betta but large air bubbles are leaking out of sponge. Is this normal and if not how can I fix Thanks