There are a many different fish that can be perfect for a beginner's aquarium. The most popular species include…
Beginner aquarists are sometimes in the dark when it comes to choosing fish. They look at fish at the store and are often unaware that the little sucker mouth catfish with a body of armor can grow to more than a foot in length and live for 20 years. Did you know that those cute orange and white (and black) oscars will get very large and unload lots of poop in the tank? Most beginners don’t.
Fortunately, the beginner aquarist has many barbs, rasboras and loaches to choose from. Barbs of interest might include the long-finned rosy barb (Puntius conchonius var.), cherry (P. titteya), striped (P. fasciatus), checkered (P. oligolepis) and golden barb (P. sachsi). Many rasboras, such as the harlequin rasbora (Trigonostigma heteromorpha), red-tailed (Rasbora borapetensis), pearly (R. vaterifloris) and scissor-tailed rasbora (R. trilineata), are good alternatives. The dwarf or pygmy rasbora (Boraras maculatus) is another possible alternative, but because of its small size (0.75 inch), other fish in the community must be of similar size.
My suggestions for 3 aquarium fish great for beginners would be:
Three Aquariums Fish in Freshwater I would suggest to Beginners is:
The recommended aquarium size will not only depend on the size of your fishes, but also on their temperament and sensitivity to change and high levels of nitrogenous waste. Keeping the water quality up (i.e. the levels of nitrogenous waste) down is much easier in a big aquarium than in a small one, since a large body of water will dilute the waste products produced by your fish. A big aquarium is also more resilient to rapid changes in temperature and water chemistry. As a beginner aquarist, it is therefore best to purchase a medium sized aquarium instead of a small one. If your budget forces you to choose between a small aquarium with expensive fish and a medium sized aquarium with inexpensive fish, you should definitely go for the later alternative. What use are expensive, flamboyant fishes when they float around belly up in the aquarium? As you grow more experienced, you can start buying more pricy fish species. As a beginner aquarist you should also refrain from aggressive fish species and fish species that are very delicate. Go for sturdy and peaceful fish and you will increase your chances of successfully keeping a well functioning aquarium dramatically. Research your fish species to find out which type of food they prefer and provide them with a varied diet. If you go for common beginner species, a high-quality flake food will normally serve as a good base. You can then start to experiment a little by culturing your own fruit flies or similar at home. Anyone who has lifted up a brown banana from a fruit basket knows how to cultivate fruit flies. If you keep bottom dwelling species, flake food is not a good idea since most of it will be consumed by other fish before it reaches the bottom. Get sinking pellets or similar to accommodate for the needs of your bottom dwellers. It is also important never to assume that algae-eaters will obtain sufficient amounts of food by grazing the algae in your aquarium – provide them with vegetable based foods as well.