5kg Castle Hot Tubs Non-Chlorine Shock Granules - white

5 Kg Non Chlorine Shock from Castle Hot Tubs Once a week hot tub / spa shock treatment Prevents spa water deteriorating and helps recover dirty water Can be used with Bromine, Chlorine and Chemical-Free Systems Top Quality branded product from Castle Hot Tubs When added weekly or after heavy usage, you will minimise unpleasant odours and eye burn. Non-Chlorine shock oxidises and removes organic contamination from water without increasing chlorine levels. 5kg Castle Hot Tubs Non-Chlorine Shock Granules - white