Apologies if this is already covered topic I found an old one dated 2016. My spa has finally arrived I ordered it in October last year good things take time. I ended up with. Hydra from galaxy spas, I ended up with a new model as they no longer make the one I ordered. I haven’t set it up yet as waiting for sparky to hard wire it.It came with a start up kit but I also found this product online . Has anyone used this tablet before as a chlorine alternative?