Total Failure

[Chaloupa]

First off...too many fish being added at the same time to a new small tank.

You just finished your cycle....added 2 fish, then a couple weeks later you added 4 more....you are causing mini cycles to happen with your tank each time....add fish SLOWLY.....1 fish at a time...or in the case of the clown pair once the tank has been established for a while longer...then add the pair. Your tank is not ready for a few fish at a time...and it can't cope. When you say your levels are "fine"...more info would really help. This hobby is about patience and trust me, with my first tank I rushed it BADLY and lost many fish as I just didn't slow down. Once you slow down you will LOVE your tank and the hobby! And you have asked questions which is fantastic! I didn't even know about Canreef when I started...I may have done a much better job if I had!

Also a mandarin dragonette will not do well in a tank that small..unless it's eating frozen foods very very very well....as there will not be enough pods to keep it fed. They also require a well established tank.....sorry but it's not the best choice for your tank.....

Just my opinion on what could be going wrong..you can keep corals..you're not doing everything wrong AT ALL!