This book is a collection of reviews of the most popular and common freshwater test kits in the areas of pH, ammonia, water hardness, and nitrite & nitrate - updated for 2010. Chapter 1 is a review of eight freshwater pH test kits. This chapter deals with the most important water quality in an aquarium. ALL other water parameters affect and/or are affected by pH. Chapter 2 is a review of eight freshwater ammonia test kits. Ammonia toxicity can destroy an entire aquarium overnight. Chapter 3 is a review of eight freshwater Hardness test kits. Water hardness can have a major impact on pH (through KH) and is important for keeping stress levels to a minimum in certain species (GH). Chapter 4 is a review of eight freshwater nitrite & nitrate test kits. While nitrite & nitrate are not usually an immediate danger to your aquarium inhabitants, they are an important indicator of the "health" of the Nitrogen Cycle. The final chapter is a review of nine "Master Test Kits" from the most popular manufacturers. Это и многое другое вы найдете в книге Freshwater Test Kit Review 2010 (Dr. Kevin J. Ruff)