Carlos,
The only supplements I use are Kalkwasser; B-Ionic, and pH Buffer.
Regular water changes should keep your tank in good health generally but corals do need to have Ca, Alk, and pH in proper balance. Kalkwasser will generally maintain your Ca and Alk levels and B-Ionic will boost the levels if your test readings are low. Since you have Corals that use Calcium in the skeleton building process, then you probably need to use B-Ionic, or a similar product, on a regular basis.
Test your water and begin to add any supplement at less than the regular recommended dosages, then slowly ramp up the dosages over time to achieve the desired levels.
HTH,
Dick
