Fish Tank Nitrate Levels

What should i do when the nitrate levels in my fish tanks turn orange when i test it?

i’m not quite sure what to do as i’ve checked and fished out all the left over food in the tank and theres not much fish waste of the bottom. any advice?
thanx everyone =] ill try cleaning the water if it doesnt work ill get something that gets nitrates out =}
err the orange is just like average orange
strangely enough it didnt come with anything else than the 2 test bottles.. we had to speak to the fish shop person so that he could tell us what the colours had to be. he said yellow was safe. so im a bit worried about the orange. i’ve only had one angel fish in the tank for a week.

the nitrates test kit should have a color guide to tell you how many part per million (PPM) nitrates you have in the tank. Usually it is a little card about the size of a credit card to compare the color with. The darkest orange on my kit is about 40 ppm. That means it is time for a water change, syphon out 25-40% of the tank water & replace with treated water.

The only way to remove nitrates in a high enough quantitiy in fresh water is through water changes. There is not a product that you can buy to remove nitrates. In marine systems nitrates can be removed biologically (with anerobic bacteria present in deep sandbeds or with live rock)

Just keep up the water changes to maintain your nitrates under 40 ppm.

edit:
It sounds like you bought a refill pack instead of the actual masters test kit. The masters test kit would come with 2 bottles for ammonia, 2 for nitrate, one for nitrite and one for ph low & one for ph high. It comes with an instruction booklet and the indicater cards to interpret the chemical tests. The refill kit is useless by it self without the indicator cards.

African Cichlid Aquarium