Stop doing anything. Buy a book & read. It will save you more in the long run. You have just introduced parasites into your tank even before cycling has finished. Any fishes added in the next few weeks will just be a waste of $. You don't need to worry about Ca levels now at the cycling stage. 15ml won't cause a big rise of Ca levels in such a large volume of water.
Not being harsh or anything. Even my relative who has asked me to help him set up a tank I made him buy & read the book before I help him do anything. For people whom I don't know, I would recommend the same.