Emergency... mistake while dosing!!!

[fresh]

Well, I just checked this morning, and everything was "still" alive (sigh).

What are the disadvantages of having this happen? If everything is open and happy latter today, can I just leave it as is?

I also read somewhere that your aragonite sand will harden if your calcium is very high... well is this the case?

Let me know please.

I will probably be doing a water change today or tomorrow, just in case.

Thanks