"Tropical Fish Aquariums - A Primer"," It wasn't until the 1900's that people around the world began keeping fish as pets.
In the early days, aquariums were a copy of the marine environment.
Different species have different needs, such as type of food, water temperature, etc.
As time went by and knowledge about fish and their environments accumulated, the task of keeping a fish aquarium became easier and easier.
Today's fish tank is usually rectangular in shape, constructed wholly of glass or with a metal frame and glass sides and a bottom of glass, slate, or other rigid material
Most tanks contain growing plants which are set in sand or gravel layer about 2 inches thick.
The average home aquarium will hold between 5 and 25 gallons, with an average size of 24x12x12 inches.
Larger tanks are better suited for offices, or commercial environments.
Tropical fishes are better suited to smaller tanks because they are smaller, and can withstand a relative deficiency of oxygen in the water.
If the oxygen in the water is not replaced, the fish will suffocate.
With sufficient bright light they manufacture sugars from carbon dioxide taken from their surroundings, whether air or water, and they will release oxygen.
Just like in nature itself.
It takes some research and planning, so make sure you seek out help from experts.
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