What's going on with these zoas?

JonoB

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These were some of the first corals I put in my tank. I recently changed from MH lights to some AI primes, although they were fine for a while under those. They still open every day, but the maroon zoas have started to get white spots on them and are turning a lighter color. Is this bleaching, or something else that is going on? The other zoas around them are perfectly fine.

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JonoB

JonoB

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Also should have pointed out all my parameters have been extremely stable and are at good levels. I'll test later today after work and post up exact readings.
 
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JonoB

JonoB

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Yeah it's definitely a different type. And that would make sense. Should I try to move them, or just let them "morph"? When I bought the frag, I was buying the other ones, the maroon zoas just happened to be on there. I like the look of them though.
 
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