How did you add the cal-hypo? If added through the skimmer, the calcium can sit in the filter and cause an increase in psi. The good news is that the calcium layer can trap some metals.
If broadcast in the pool, it can take a while to dissolve and register as FC. Also, if broadcast, make sure you brush up any residue as it is slow to dissolve and can bleach your liner.
I broadcasted the cal-hypo along the sides of the pool and brushed the sides and bottom vigorously after the application.