WATER

1. FRESH WATER
• TEMPERATURE
• OXYGEN AND CARBON DIOXIDE
• PH VALUES
• HARDNESS
• FOOD CHAINS
• PEAT
• TURBIDITY
• NITROGENOUS PRODUCTS AND THE NITROGEN CYCLE
• LEVEL OF NITRITES (NO2-)
• OTHER DISSOLVED SOLIDS


2. SEA WATER
• TEMPERATURE
• SALINITY
• DENSITY
• MEASURING DENSITY
• THE CH
• PH VALUES
• THE NITROGEN CYCLE
• FINDING OUT THE CHARACTERISTICS OF NATURAL WATER
• OTHER DISSOLVED SUBSTANCES
• TURBIDITY
• THE ORIGIN OF SALT WATER IN MARINE AQUARIUMS
• ARTIFICIAL SALTS


3. DIFFERENT TYPES OF AQUARIUM
• TEMPERATE WATER AQUARIUMS
• TROPICAL AQUARIUMS
• SPECIAL PURPOSE AQUARIUMS
• PUBLIC AQUARIUMS