You should drip that into a high flow area in the sump.
Sodium carbonate or bicarbonate precipitates out pretty easily when reacts with calcium ion in saltwater. Also don't run calcium chloride and sodium carbonate into the sump at the same time. Stagger them to minimize the reaction. The high flow helps reduce the interaction.
Can you change the start time of each dosing so you can stagger?









awesome setup
Sorry to hear your loss.
Those are nice additions to your tank. Was that a Indonesian yellow tang? I see you are getting two nice size clams. Iodide will be needed as supplement for those.