How to keep water clean in ice bath?

Tablets

https://www.amazon.co.uk/dp/B012EA35BE?psc=1&ref=ppx_yo2ov_dt_b_product_details

Floating dispenser

https://www.amazon.co.uk/SUDS-ONLINE-Small-Chlorine-Floating-Dispenser/dp/B01CMN9UM6/ref=pd_bxgy_img_sccl_1/257-3483773-6650317?pd_rd_w=sWK7J&content-id=amzn1.sym.79b812bf-5c8b-4c0c-851c-784423adaff5&pf_rd_p=79b812bf-5c8b-4c0c-851c-784423adaff5&pf_rd_r=MMHXG48EZD2F1FWCD6C2&pd_rd_wg=cWsZq&pd_rd_r=40ba23c8-cfe7-4f32-bd60-70bc5320f857&pd_rd_i=B01CMN9UM6&psc=1