Hi and welcome.

Yes, you need a multivitamin too. There are a few different ways to supplement and I’m going to tell you two different ways. The one thing that is the same is that you will use a phosphorus-free calcium without D3 lightly dusted at every feeding. Then…
Traditional method - Phosphorus free calcium with D3 use one feeding every other week, for example the 1st and 14th of the month. A good multivitamin like Reptivite without D3 use one feeding every other week, for example of the 7th and 28th of the month.
Easy method - Use a combination product of either ReptiVite with D3 or Repashy calcium plus LoD
https://www.amazon.com/Repashy-Calc...669338316-B00DLJRMV2-&hvexpln=73&gad_source=1 for one feeding every other week.
I prefer the easy method myself. Just two products - calcium without D3 and I use the Repashy LoD.