An aquarium is a closed ecosystem where you bring in a piece of nature into a glass box and, keeping water chemistry and quality right up is the most important factor in maintaining an aquarium. This means, the filtration system in an aquarium is the most important part of the entire aquarium setup

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he cardinal tetra is a little, lovely fresh water fish. It looks like the neon tetra, and is frequently confused with this progressively normal fish. Cardinal tetras are local to Brazil and Venezuela, and are found in the upper Orinoco and Negro waterways. Most cardinal tetras accessible in fish stores are wild-gotten; however increasingly reared ones have opened up as of late. Be that as it may, in contrast to numerous other fish, the cardinal tetra fishery is accepted to be supportable and this species isn't at present compromised in nature. A decent method to tell if the fish are wild-gotten is to examine them for balance harm brought about by the nets used to get them.