That is somewhat my experience too. I have wonderful fast growth but in some species I still get curly new leaves, especially in new growth of my Ludwigia glandulosa, and it doesn't seem to help how much I dose of CaCl2 (and all the others).
But I've honestly been slacking in Mg-dosage lately because I though my tap had enough.
My last dosage regimen is like "Only dose up the Ca and Mg-levels after each wc, and then dose KNO3+KH2PO4+Micros for the whole tank volume three-four times a week depending upon plant pearling".
Should I instead dose Ca+Mg with each dose throughout the week?