I would avoid any sequester that contains phosphates so please read the labels, sometimes they don’t list it though.
A best bet would be to use SC1000 from Orenda, it is safe to swim in and carries NSF certification and contains NO phosphates.
It will also help keep the blades of your salt generator from scaling up.
Down load and use the free Orenda App to help keep your pool water in great shape and extend the life of your pool surface and equipment.