Cheap Chlorine Damage

A change of tack, but saw this interesting comment recently and felt it should be shared. It was posted by a spa repair engineer highlighting the damage caused by cheap chlorine products:

Although it keeps me in a job repairing shaft seals and leaking spas, can we put a stop to cheap chemicals in hot tubs? More and more cheap margin related chemicals seem to be on the market and customers genuinely don't understand the difference. Surely it's not helping the industry? Parts are not cheap nowadays so repairs can be expensive

Obviously this doesn't just apply to hot tubs; pools also have pumps, not to mention other expensive components (Filters and Heat Exchangers). So although you maybe saving a few quid initially, it will cost you in the long run......