Live plants absorb the nitrates from fish waste to help keep the water cleaner. A bundle of them sized for small aquariums cost less than $30. With saltwater systems, a nano reef aquarium can ...

ABOUT 11,000 fish from the Great Barrier ... of the 33,000 creatures in the aquarium, which contains 10 million litres of water. Everything from grey reef sharks to 200-kilogram groupers and ...