Zoas changing

Mattyice572 · Apr 12, 2020

Hey guys, i have a 90 gal Mixed reef tank. I use tropic marin salt, salinity is 1.026 i use onky RO water i make with a brs 4 stage unit tds comes out 0. Im running 2, ai hydra 32 hd fixtures on the brad ford signature setting. I have a eshopps 200 skimmer, 2 powerheads and my main pump runs 1500 gph. I dont see any dead flow spots, all my other corals are doing well. My ph is 8.3, ammonia 0 nitrite 0 nitrate about 20 ppm, ca is 580 mg is about 1300. My other corals are, hammer, red seratosa, red cap monti, red/green grafted cap, super man monti, bonsai acro, green pocillipora, purple stylophora, utter chaos zoas, green button palys, green fukashima palys, meteor shower cyphestrea, branching cyphestrea, green snake polyps, utter chaos zoas, neon green star polyps, and grandis palys. All of thise are doing great and growing nicely. The 3 im having issues with are my purple monsters, rainbow hornets, and alien eye venom zoas. The alien eyes i added over a month ago and were glowing and now theyre sort of browned out but still spreading nicely. The rainbow hornets added over a month ago have them half way up in the tank, they have lost the ring and they turned more brownish and the skirts shrunk down. The purple monsters i have 2 frags. 1 i added over a month ago and completely changed color from purple to pink the polyo shrunk in size, and the skirts shrunk. I have them low in the tank. The new frag of purple monsters i added about 2 weeks ago and have them up high in the tank have also started to change. I feed daily 2-3 foods and switch up the foods each day. i feed mixture of marine snow, Brs reef chili, frozen cyclops, frozen fish eggs, frozen coral food mix, and i always add brightwell vitamins. I have no idea how to correct it. Any ideas? Sorry about the crappy pictures, i dont have a lens kit so a friend suggested using an orange pill bottle it kind of works. In the pictures you can see the 1 purple monster frag has some good looking fat polyps and some are shrinking and changing color from purple to pink