Dosed calcium too fast?

Blue Collared Aquatics

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Wife read my calcium at 325 and raised it to 425 in one shot. Instantly all corals closed. Within minutes. Any help recommended. Will they die off or just stress out and come back?
 
Wife read my calcium at 325 and raised it to 425 in one shot. Instantly all corals closed. Within minutes. Any help recommended. Will they die off or just stress out and come back?

Which cal product?

and, was it dumped in right above the corals?
 
Wife read my calcium at 325 and raised it to 425 in one shot. Instantly all corals closed. Within minutes. Any help recommended. Will they die off or just stress out and come back?
Although fat addition can have adverse effects, coral can tolerate up to 530 in my experience. Unfortunately to get hogh number of CA down, you will need to do a series of water changes. Keep an eye on alk levels which are balanced with CA
 
I think you are ok. I believe some salts like oceanic mix up at 500ppm. I have dosed mine to that level with no issues before. It's weird that your corals closed up. I don't think it was mixed well before going into display. Make sure alk is good as others said and call it a day.
 
Just tested and it’s actually 510 ‍. Going to do a 25% water change tomorrow I’m guessing.

510 is not too high, might want to see how they look before bringing it down with water changes and only dose alk until your cal drops

She might want to use this reef dosing calculator in the future, it does post alerts.


Please keep us up to date
 
510 is fine. Let it come down naturally. The aggressive dose will only irritate the corals and they will be fine. ALK on the other hand and you would be in big trouble depending on corals in the tank.
 
As govols asked above, which product?

A pure calcium product is fine and doesn’t warrant a water change, but some, such as Seachem Reef Calcium or kalkwasser or All for Reef could be a big problem due to a big alk rise.
 
With the large increase in calcium I would only assume the alkalinity also increased . In turn this is most likely why the corals closed and seam unhappy .
 
It's not the number..it's the 185 ppm increase in one swoop.

Maybe. I recommend slower for reasons of impurities, but I’ve rarely seen reported issues from a calcium bump, and calcium is not typically a limiting material for corals.
 
With the large increase in calcium I would only assume the alkalinity also increased . In turn this is most likely why the corals closed and seam unhappy .

If he added calcium chloride, there would be no alk increase.
 
it raised my alk to 13.3 from 9.5. Calcium is at 500 when tested this morning. Did 25% water change so thinking the the alk will drop to 12.5 and calcium to 475. Mixing up another 25% to do change tonight then thinking I’ll bring back down to 450 and 11.7. Which I’ll let gradually go down and dose po3 and no3
 

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