I have a 13.5 evo! I think if your keeping corals upgrade your light to something you can program. I got an AI Prime 16hd and I love it, it’s a small tank for the light so I have my intensity way way down. But you got to get something that programmable cause you won’t always want to manually turn it on and off at same times every day. Second I upgraded the filtration and got an in tank media basket, some ppl love it some ppl say it’s a waste at the time I could afford it and it was really Important to me to collect all the solids with a filter floss abd pad rather than have stuff fall down and start to breakdown before it got into a protein skimmer. I also got a skimmer too before the media basket, i didn’t even like the flow and design. Also with the basket you get a plug to plug that hole in the middle of the wall up with. I used simple silicon before I even got the plug. My second chamber is all bio media. And just last week I finally ordered a new pump sicce 0.5 but that’s now 7 months after I started the tank so I don’t think it’s nessisary. Since your starting I will share what shocked me the most. All I have are two small clown fish, abd a few snails and coral. I feed very little and all my water parameters are perfect for almost 6 months. Both I test and I bring water to the fish store where they have a machine. Even with correct water parameters and little feeding my tank has gone through many algae stages. The ugly stage happened when brown showed up on the glass and the gravel. Like It comes and goes overnight. I used microbactor 7 to just keep the Benifical bacteria up but after that than I got some hair algae, it has gone away and is now back. Again everything is fine, texts, corals, feeding amount, also I have my lights on from 10am to 7pm. So the cycles the tank does can be pretty scary but iv learned to be patient and I always kept looking for answers and sometimes I found some other times I didn’t. That is the biggest discouragement for me when starting in the hobby so figure I would share. Best of luck man!