Need some advice, thanks

[Matt]

First, welcome to Canreef, and welcome back to the hobby!

Adding in on the lights issue, speaking from experience. An organism that uses light for photosynthesis has no idea how many gallons of water it is in. It only 'knows' how bright the light is. In a 25" deep tank, you have a lighting challenge if you want to keep light-loving corals or clams near the bottom. Eventually, it will become a trade-off between light and heat.

Tank might also be too small for a scooter blennie. They have roughly the same requirements for live rock volume, healthy pod populations and tank stability as a Mandarin.

The final note I'll make on the 45 tall is that you're minimizing surface-area to volume with that setup (again, this is my experience with a not-too-different effort). That leads to dificulties with aquascaping, access (how long are your arms?), water flow, heat control and oxygen exchange. If I were doing it again, I'd be looking to reverse the ratio, and go for a longer, shallower tank.

Cheers,
Matt