As long as you understand what each product is adding to the pool, you can use whatever form of chlorine you want.
Personally, I would add at least 20ppm of CYA right away and then use the puck to continue to raise it where you want the CYA level to be. With no CYA, all the chlorine will be lost to the sun very quickly.
Personally, I would add at least 20ppm of CYA right away and then use the puck to continue to raise it where you want the CYA level to be. With no CYA, all the chlorine will be lost to the sun very quickly.