@Bo Lin
My only specific plan is to get a psychedelic mandarin for this tank. There's also a wrasse I'd like to have so I'm upgrading partly with that in mind but there's no telling when I'll find it in one of my local stores. But the 25g is definitely getting too small for my corals and I'm getting very invested in the hobby again so it seemed like the right time to upgrade. Plus I'm really tired of having separate tanks. (I also have a scooter in a separate QT!)