Purple up really isn't the greatest thing to be adding to your tank. Regular PWCs as has been mentioned will replinish your essential elements. Right now your tank is "new" so putting addatives in really isn't going to benefit you. With your nitrAtes being as high as they are I would test your source water for sure as Cmor said. If you aren't using RO
water then chances are you are getting those nitrAtes from your source water.
Kalkwasser helps to maintain CA
levels but will not raise them. If you aren't testing your CA ALK
you should be. I would stop all additions to the tank for now and do a major PWC
and then test your water params again.