Regarding living rock I think it's a matter of luck. Six months ago I bought 6 kgs of an Indonesian batch that came with oxyrrhis marina. It took less than a week to clean a 600 gal tank from an ostreopsis outbreak.
A few weeks later, oxyrrhis starved and vanished. Ostreopsis showed up again (it forms cysts).
I think that the key is:
- Being lucky and get a good living rock batch
- Keep on feeding the pods from that rockwork as most of them will starve when dinoflagellates get eaten.
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