I only have saltwater tanks for 3 years but I have an alveopora that's been with me since then and doing great. It went through copper poisonning and survived it.
Considering how hard these corals are to keep long term, I am pretty happy about it. It's even growing.
I also have a few SPS and a duncan from the begining doing great.
I have read that sponges can live forever.
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More fish die from human stupidity than any other disease...
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