They can be broken down to space , environment , light , heat , food and water . If any of your fish are of the former type and are being kept in a small aquarium along with other fish they may never breed since they may not be able to recognize any territory as their own. The more the surface area of the water in the aquarium, the more easily unwanted CO 2 is removed from the aquarium. The fish belongs to the seas and rivers so a similar environment is required to make them feel at home even though in captivity. This is where the plants, rockwork, pebbles, gravel come into play.
Plants serve a variety of purposes for the fish.
Fish use plants to hide, as shade, as spawning sites and sometimes as food. Rockwork also serve as hiding places, shades and spawning sites. Artificial fibre moulded rockworks are also available. Plants and rockwork also add to the glamour of the aquarium. All living beings require light for the stimulation it provides and the ability to see the surroundings.