Change50% of the water at least weekly (2.5 to 5 gallons) 20+ gallon tank (more than one crayfish) Change 25% of the water weekly. (4 gallons +) The bigger the filtered tank is, the less often you'll have to change the water. You can always use your trusty eyes to look at the state of the water. Tokeep clams contained in the aquarium, place them in a single-serve applesauce container. Poke holes throughout the container to aid in water flow through the sand. Fill the containers with a fine substrate, such as sand. Three or four small clams can be housed per container. Larger clams may need a container for themselves; it depends Bassenjoys a climate of 60 to 65 degrees Fahrenheit, and this should keep your fish happy and healthy. You should consider using a chiller to regulate temperature. You can also place a thermometer in the tank and check it daily to make sure the temperature is staying exactly where it should be. Sand Sand is a much finer and softer version of gravel. It is made up of tiny particles of rocks, shells, and other earthly materials. Since the granules are so tiny, sand makes the ideal substrate for bottom-feeding fish or fish with soft bellies. The extra fine particles feel much softer compared to other substrates. Lookinginto an aquarium can trigger a switch in their body and mind, helping to reduce stress and provide a sense of relaxation. 5. Reduces Anxiety. Along with the reduction of stress, aquariums can also help lower anxiety. Fish tanks can arguably serve as a calming distraction. Whatdoes an aquarist do? A typical day in the life of an aquarist contains a wide variety of different tasks, which can go beyond the basic aquarium tank cleaner job. Caretakers of aquatic animals have lots of tabs to keep track of, including: Policing water quality; Fish tank maintenance jobs; Equipment repair; Presenting to aquarium patrons 16Benefits For Having A Moss Ball In An Aquarium: Helps Oxygenate The Water. They Balance The pH Levels. Acts As A Natural Water Filter. Reduces Algae Growth In The Tank. They Absorb Harmful Bacteria. Provides Food To Shrimp And Fish. Good Nitrogen And Phosphate Levels. Provides A Natural Habitat For Fish. Bioballs should be used for biological filtration only. You see, bio balls are designed to house bacteria, not to trap and remove waste from the water column. That is the job of mechanical filtration, such as sponge pads, foam blocks or filter floss. A mechanical filter should be in place before the bio balls in your filter system to catch any g8CO.