At your local fish store you will be able to buy test kits. Liquid ones (ones with glass test tubes in then and bottles of liquid) are much better than the strips. They're more accurate and last a lot longer, although they are more expensive. You can usually buy seperate tests for ammonia, nitrite, nitrate, ph, hardness etc but a master kit that contains ammonia, nitrite and nitrate is best to begin with. These three toxins I listed appear when fish waste is first produced and it goes ammonia - nitrite - nitrate in that order. Ammonia and nitrite should be 0 and nitrate relaitvely low as they are toxic to fish (although nitrate is normal, as long as it's not too high it's safe). This test kit will be able to give you readings for these three toxins and then you can post your "water stats" as asked for. Water stats are often referred to water parameters here just in case you had seen that as well and were wondering.