Strontium helping zoanthids?

[mrhasan]

Originally Posted by ScubaSteve

Calcareous corals can incorporate strontium into their skeletons, hence with the Sr levels will deplete over time.

Daniella, if you can, see if he can test some of your freshly mixed water before a water change. I'd be curious to know if the Sr levels are already low in your salt mix, which would give you consistently low readings. We might be able to pinpoint what is using it the most.

+1. Many salts skip on proper levels of such elements. Maybe because of their expense? Or to keep the market of the trace elements alive?

[mrhasan]

Here's a nice article on strontium by none other than Dr. Randy

http://www.advancedaquarist.com/2003/11/chemistry

Looks like seawater actually has around 8ppm (not 12ppm) so Daniella's strontium is not very low (6ppm) but that 25% can make some big difference I guess. Did you test it after dosing? I looked into aquavitro salinity and H2ocean's salt mix analysis and they seem to guarantee strontium anywhere between 8 to 10ppm.