I have a 90 g so by that rekoning i need About 16 small fish for mine !!!!
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Being a 90g you can't have large tangs but Tang's that don't get past three and a half to 4 inches or require that six foot length because they like the bolt from one end to the other, you can have one. My 4 larger tangs are all over 6". Chromis school as do anthia. And others just like to stay in groups or pairs I don't do a lot of swimming around. Some of them hang out around the sand or in the rocks... and all those things you need to keep in mind besides the fact that they have to be compatible. I had to keep in mind the every fish that had a purpose and for the ones I already had in my tank they all had to get along. At one time I had 5 anthia but I had a giant serpent star who picked them off one at a time.I have a 90 g so by that rekoning i need About 16 small fish for mine !!!!
+1!With a alk at 9.3 you will need higher nitrate reading. If you want to keep a low nitrate level you need to bring your alk down to 7-8 dkh. High alk and low nitrates cause alk burn.
Frag off the healthy portion and remount it on another plug. If you don't the rest will stn.

