Buying chalk

[SouthernLifter]

This is the only chalk that they sell around here:

Carbonato De Magnesio - Polvo - Gimnasio Crossfit - 500 Gr | MercadoLibre

Is this ok? Or is it better that it comes in the form of a block?

Thanks

[francesco.decaro]

This is the only chalk that they sell around here:

Carbonato De Magnesio - Polvo - Gimnasio Crossfit - 500 Gr | MercadoLibre

Is this ok? Or is it better that it comes in the form of a block?

Thanks

I use liquid chalk, from Amazon. It's less messy than the magnesium block and it sticks to your hands for longer