Simply Koi and More Koi

I have been using a API chlorine & chloramine test kit for a few years. For testing the water exiting my purifiers and gives me an idea when it was safe to go on line to RO membranes and pond. I have now just about run out.I can,t seem to source these kits anywhere. So just wondering what you are using and where can I get them?

Dave,

Normal chlorine test kits aren't very sensitive at levels low enough to make sure that there isn't any chlorine coming out of a purifier so I've already come up with the simplest test possible for just this situation. It on my website here:
http://www.mankysanke.co.uk/html/questi ... .html#DPD4

Thanks Manky
I already have a link to your site and have used your method for checking for chlorine before. However I did not know about the DPD4 tablets though. I have, since posting in this forum, obtained a dropplet type chlorine test kit from a aquariest outlets. So hopefully will be able to detect chlorine at a low level.
By the way great web site and thanks once again for your input