http://www.charterhouse-aquatics.co.uk/catalog/api-freshwater-master-test-kit-p-1091.htmlBy far the best and most acurate.
I am guessing u got stress zyme with the tank and it tells you to add some then add some hardy fish?
If you google stress zyme reviews you will see its no good and doesnt cycle your tank.
If you are not planning on getting fish for a while could you not set it up and get it cycling? It will prob take 4 weeks for the tank to cycle. You need to add a source of ammonia, i use a prawn and put it in a fish net at the top of the tank, it will break down and start off the bacteria you need to keep your tank clean.
If you test everyday for Ammonia, And Nitrite you should see them peak then fall and when they are back to 0 you test for Nitrate, at this point it will be high but you do about 50% water change then test again.
You should then add a few fish, if you leave the water with no source of ammonia the bacteria will die and you need to start all over again.
As i say, you should allow 4 weeks.