Ok. Just need someone to walk me off the ledge and tell me it gets better. I'm 8months in to my new mixed reef tank and I just can't get my tank to be happy. Every day there is something dying in the tank. Mostly corals but fish too. My trachy was the happiest in the tank. Left for 3 days, came back and it was basically dead. All of the sudden my Euphylia are melting. My Raja chalice was super happy and now it receding like crazy and won't stop. I have my LFS doing weekly maintenance which include a 15-20% water change each week. My parameters seem to be in a relatively good range. I have corals that are usually hard to keep thriving and corals that are usually bullet proof dying left and right. Just don't know what to do. Bummer is instead of walking in each day to enjoy my little piece of ocean I walk in each day stressed about what I'm going to find dying. Ugh!!
To be honest, no it doesn't necessarily get easier. I have been an aquarist for most of my life and my latest reef aquarium is 400 gallons and is about 6 years old. My methods and procedures are perfected and lighting, water flow , filtration, water quality is as as good as it gets. I will do quarterly ICP tests to check for problems. I haven't made a significant mistake or had an accident in a couple years. Yet, this week cyanobacteria started getting out of control on the back wall so I had to do a chemiclean treatment. Aiptasia is a never-ending battle, and in spite of having about a dozen peppermint shrimp in the tank, I am always killing that back. But this week a good size one got wedged next to my beautiful 8 in diameter blastamosa colony. Before I noticed it it stung and killed about eight heads. Vermatid snails are another constant struggle that damaged coils if you don't keep an eye out for them. I have a big 16-in diameter Raja Rampage and the center area is dying. Most likely because of a flow problem related to how it shape is changing as it grows. Sucks because I was just about to trade it in for a smaller one again. About 2 months ago I had a big Hydnophora that got an infection on one of its tips and it started burning like a forest fire through the colony. I had to frag it and restart with a small surviving piece and it's doing well so far.
This is all from a guy who knows what he's doing and has a mature 6 year old mixed Reef aquarium. I say all this because I want you to realize that your expectations are probably too high. If you just want an aquarium to look at and provide nothing but joy and Zen then being a reef aquarist is not the right thing to do. The general success in spite of the struggle and challenges is where the joy mainly comes from with a mixed reef Aquarium.