dave @ stejonda wrote:
In message , David Hearn
writes
I've not been able to find any test stuff to actually check the
concentration which I've heard people talk of before.

Look on this page

http://www.bes.ltd.uk/products/108.asp

for item

7583 Test Kit for X 100

Will that do?

Quite possibly, although at £8.15 + VAT it seems rather pricey considering
it costs nearly as much as a tub of X100 anyway! Why not just add more
inhibitor and be done with it?

Anything else available cheaper?

Thanks

David