Water Testing

Finally bought a couple of water testing kits. Ph and then Nitrites and Nitrates.  Did my first testing yesterday. Ph fine but No2and No3 are through the roof. However the fish are still swimming. (did have 2 dead cat fish...) and they are all still hungry.  It was not till I opened the No3 test kit that I discovered the colour chart was missing. I emailed Tetra and almost instantly had a reply with a colour chart attached. Will be checking water again today. I've added this detail in a chart to the side of my Blog.