[nathankaye]

Who is best supplier for chemicals/detergents. Just been using power washer which does pretty well on its own, but reading threads on here n no end of u tube vids n they make lite work of it. Know many seem to like this "hypo" but unsure how safe to use. I have a huge job where customer has won n been in mags (apparantly) for her mediterranean gardens. Cleaning indian stones with surface cleaner but thinking of some chem to help it along?

[Smurf]

Price wise I'm not really bothered about myself as would prefer to deal with a local supplier and pick chems up as/when required which is very handy than buying stuff off the net.

[David Deer]

On the other hand hypo is hypo.
If you want cheap scour ebay and the net for hours/days/months and check p&p and vat inclusive prices.
If you want reliable follow the advice above.