I've tried to keep acros three times now. They live for a while, then give up. I think it's because I only dose my tank every 3-4 days. Now that I switched to Bulkreefsupply for my 2 part dosing, I have the stuff available in squirt bottles. I think I might try to dose every day or every other day. Then try acros again. everything else is doing fine. My Euphillias, Montiporas, Blastos, Acans, birdsnest, and stylophoras are all happy and growing. But every time I put acros, they decline and die. Nitrates are usually 1 or a little more ppm. Phosphates are controlled with a GFO reactor. Water level is constant with an ATO. Calcium 400-420, dKH 8-9. Temperature is regulated at 80 degrees. pH is 8.1-8.2. I don't know. Maybe it's my green star polyp, xenias, or taro tree secreting toxins, but I'm running a carbon reactor too. I really really want a big staghorn garden. Yours looks beautiful though.