[Smurf]

Most local pool suppliers will sell it rather paying over the odds online including delivery.  Unless that is if you want to buy it in bulk from the likes of an online wholesaler.

[Keiron Bradley]

He asked for a link so I gave him one - with free delivery. And very prompt too....and at roughly £1 / litre it's not exactly pricey.
I'm just trying to help him out.

[Darren Nationwide]

Good before and after pictures however would be better if close up like example shown, clients love to see before and after pics as they can relate to the work completed, without seeing it they cannot gauge it in there minds  good luck for the future regards Darren Nationwide UK Cleaning