"Our results show that potentially toxic metals such as zinc, found in commercial sea salts and supplements, can have detrimental effects on corals. Therefore, we recommend regular monitoring and restrained supplementation of zinc in coral aquaculture systems."It is true....
Thanks to Randy Holmes-Farley.
An example of a research on the toxicity of zinc :
https://peerj.com/preprints/2858/
The article didn't mention any positive difference between 0 & 10 µg L–1 zinc?
I highly doubt they could come to any conclusions in any case from a 2 week study ????
"After two weeks, no signs of necrosis were observed in any of the treatments. However, at 100 µg L–1, we detected a considerable ~62% growth reduction compared to zinc levels of 0 to 10 µg L–1."
Their dreaming
