On 01/03/2010 21:49, JimK wrote:
On Mar 1, 8:20 pm, Andy wrote:
Steve Firth wrote:
wrote:

Safer than bleach though, is water purification tablets (the type for
using in drinking water in dodgy parts of the world - buy them in
Boots) - chuck a whole packet of them in the header tank.

And water purification tablets are an expensive way of buying bleach.

Bleach is usually sodium hypochlorite, Na Cl O.

The purifying tables I have are Sodium dichloroisocyanurate, C3 Cl2 N3
Na O3. These are for camping, but the same stuff seems to be used in
swimming pools (which might be cheaper for large quanitities!)

Although both smell of chlorine they are different chemicals.

Andy

shurely the "active" ingredient in either is chlorine?

JimK

There are some that are iodine-based. You categorically do not want to
overdose on that. And no, the active ingredient in them is not chlorine.

--
Rod