Will cal keep these corals from opening

[Larsen]

I'm am at my dads and these are some of the corals that are not opening. Cal is at 350 trying to get it higher will this keep the corals from opening been doing 10-15 gallon water changes for the past four nights an coral is getting worse. 110 gallon tank two reefkoi LEDs 120watt just installed. Help please

 

[coralfarm123]

I would bring the calcium up, but I would bet they are reacting to the new light. Be careful LED can bleach coral if they aren't acclimated. Water changes won't bring you calcium up to normal levels, and will make your water more clear. The cleaner water will allow more light to penetrate which may be the problem if they are reacting to change in lighting. For raising the calcium get calcium chloride or two part.

 

[Larsen]

Ok we just tested cal and it's 500

 

[btkrausen]

Ok we just tested cal and it's 500

What did you add to jump calcium from 350 to 500 so quickly? Careful with raising any parameters too quickly. Those specific corals should be fine with 350, or at least it shouldn't be causing a problem with them. If you just installed LEDs, that would be the culprit.

 

[skinz78]

I am wondering where the Alk is at because it generally is the cause of corals not opening?