Small aquarium tropical fish species

Aquarium Basics | Aquariums

The standard aquarium is a rectangular prism, but there are many alternatives available. Here are some major considerations:


  • Surface area is where gas exchange (oxygen in, carbon dioxide out) takes place, and the bottom is where many territorial fish set up their home turfs. Often the more decorative aquarium shapes have relatively low surface area. Good water movement and filtration can make up for poor surface area, and restricting the livestock to non-territorial species makes bottom area less significant, but in general, a longer, lower aquarium can sustain more life than a narrower, deeper tank can.
  • Very deep tanks are harder to service. Just scraping the algae off the glass of a 6-foot tall aquarium requires considerable ingenuity. Siphon vacuuming the gravel is another considerable challenge.


  • Standard sizes range from 2½ gallons to 240 gallons, and custom sizes are available from less than a gallon to thousands of gallons and even larger.
  • Get the largest aquarium you can possibly manage. It is easier to care for a large aquarium than a small one, and it is much easier to care for a huge aquarium than a tiny one. The reason is simple: maintaining a fish tank is in large part a matter of keeping a complex system in balance; the more water there is, the longer it takes for an imbalance to occur.
  • Aquariums are heavy, and water is even heavier. For a final weight of tank, stand, gravel, and water, figure about 10 pounds per gallon (1.2 kilos per liter) of the setup. You must use a stand or cabinet that is specifically designed to hold an aquarium of that size, and you must be certain that the floor under the stand is able to support the weight without problem.

Desktop Tanks

  • Desktop tanks include the popular nano systems, as well as a great range of aquariums, from ornate betta bowls to art-deco sculpted tanks with miniature lighting and filtration options. But they must be properly utilized; you cannot simply scale down a regular aquarium setup to fit a tiny desktop unit.
  • Small displays are perfect for animals and plants that would be lost in even typical small tanks. Small invertebrates like shrimp—both freshwater and marine—are great for these little tanks. Tiny fish like Heterandria, Boraras, and the smallest gobies can be the focus of the display instead of just being lost in the background…or eaten for lunch! So instead of a lone zebra danio endlessly switching directions or a stunted community of regular aquarium species, a school of truly tiny fish can explore a planted landscape in which they are the main attraction.
  • Water stability is extremely precarious with these small volumes—another reason to use only the smallest livestock. Heating, lighting, and filtration become major issues as well, but manufacturers are rising to the challenge and producing equipment designed specifically for these diminutive aquariums.

Goldfish don't need heat

by biclighter

So that is a bit curious. probably not a goldfish.
here is a list of tropical fish by name.
click away and see if you can find out what kind of orange fish you have. could be a platty or molly? if it is a platty or molly and you get it some friends, you should have 2 females to 1 male, to keep the dynamics going smooth. BUT those guys are livebearers (they have actual fish babies instead of laying eggs) and livebearers are very prolific breeders. anyways, let's figure out what that orange fish is and we'll go from there.

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