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Temperature and sunlight are two abiotic factors found in nearly every ecosystem, but since the Great Barrier Reef is an aquatic ecosystem, it has some additional abiotic components, including buoyancy, viscosity, light , salts, gases and waterdensity.
should not use sea sand. Sean sand is
often contaminated and will pollute the water in your tank. The small shells and tiny pieces of coral
mixed into the sand will inevitably raise the pH level of your aquarium.
depends on what you will be keeping in your tank. If there will be only fish, you will not need
intense lighting. Usually, the fixture
that comes with the aquarium should be sufficient. However, if you plan on keeping reef inside
your tank you will need to consider your lighting options. The proper lighting in a reef tank will have
considerable effect on coral growth and coloration. The main factors you need to take into
consideration are light intensity, spectrum and tank inhabitants.
A standard 55 gallontank needs at least 550gph of water circulation. The minimum acceptable water flow for afreshwater aquarium is 10x the tank volume per hour. For saltwater aquariums without corals, thereshould also be a 10-15x tank volume for circulation. As long as the pump you get follows theseguidelines, the itself won't matter.
HI. propane has 91000 btu's per gallon. 20# bottle has 4. divide btu's of heater by #of gallons for hours of use. I have the same heater and I think the med. setting both burners on is more the 7000 btu's.