From personal experience, you can't slam a reef tank together. I think every "new" reefer wants all these cool corals and wants them to thrive and gets those TANK SHOTS from the magazines. It just doesn't work like that. Reef tanks are like cheese, they often do well when they are aged out and let to "ferment". There's so much NOBODY knows about what is going on inside these tanks, but we are pretty sure there's a maturation point. Anyone that has kept a tank for longer than 6 months can report miraculous growth happening, it's like riding the rollercoaster. You tick slowly to the top, you are nervous, things appear to be going wrong, then BLAMMO. Off to the races. I think PAR is overblown. A lot of people go bonkers with PAR, but in the wild most corals never get above 150, and if they do they bleach out in the tide pools from too much light. It's really tough to recreate the ocean. Your zoas are not dying. They are just closed up. I've had zoas weather closed for sometimes 2 months and all have come back. Each coral is different and sometimes it takes a while for them to settle in. My advice would be don't get so caught up in numbers right now and just let it happen. Take the gunk, the diatoms, the GHA, let it go. It's like that scene from finding nemo when he's in the whales mouth and dory just says "LET GO". Frustration always leads to failure, because you are leveraging so many emotions into this lil' box of water. I can't grow a favites in my tank. It NEVER grows. Everything else (LPS, softies) does well and I have a couple SPS doing well, but favites? Can't do it. Won't grow. So I just don't keep favites. Is it me? Probably. Am i going to go on a fruitless quest to grow favites? No. I hate them. To me they are trash corals. Why do I care? Let it happen my man. Serenity not frustration. You did not get into this hobby to be frustrated. Best advice I ever got "Nothing good comes fast in a reef tank". Progress not perfection. It's a game of inches! Ok I'm done with cliches. OK one more - Don't give up! Don't be afraid to ask for help!