Help! Calcium overdose!

[gotwake89]

So I was doing a water change yesterday on my 75 gal and was mixing up my salt mix with my RO/DI water and accidentally used my gallon of high concentration calcium chloride RO/DI mix from bulk reef supply that is only supposed to be dosed about 1ml/gal (found here: http://www.bulkreefsupply.com/brs-bulk-calcium-chloride-aquarium-supplement.html) and now my calcium reading is off the chart (test only goes up to 500). I know that calcium will slowly lower over time and that water changes will also help lower it. I did a 5 gallon water change this morning and am waiting a while for it to fully mix before doing another calcium test.
My question is are very high calcium levels dangerous for my fish and corals? Is there any other way of lowering the calcium besides water changes and time? And if not, how frequently should I be doing the water changes to lower the calcium to a safe level?

ALK 2.5 meq/L
mg 1350
calcium ? 500+

 

[gotwake89]

more info before anyone asks. I am using both a salifert and a red sea test kit so I know the test kit isn't the problem.
I am using IO reef crystals salt mix. I know this has the correct calcium level so it probably wont lower the calcium very quickly with water changes but its the only salt I currently have

 

[Painted skin]

http://www.reefcentral.com/forums/showthread.php?t=2017078

And if you want to lower it calibrate SG make sure temp and ph is close, should have no problem doing larger WC.