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specially now with all the technology is a lot safer to keep water levels and parameters

I guess so, some day I will test the parameters using all that new technology. Normally I notice if the corals are not dead, it's fine.![]()
I’ve seen the exact same thing with them. Sometimes they split and then shrink off the face of the earth.Yes: https://www.reef2reef.com/threads/tank-birthday-47-years.55423/page-212#post-5775570
Sub, I have found with the green star polyps they will cover an entire tank for a few years, then for no apparent reason, croak. I have also found that with giant leathers and elephant ears. They grow to huge proportions, then shrink. It may be to coral wars but I have no idea.
This thing grew from fingernail size to about 12" across. After four or five years it shrunk and disappeared.
Some years my tank was loaded and sometimes, like now it is fairly sparce. Tanks that are less than 15 or 20 years old may not see these cycles, but they happen all the time.



