There are several types of kreisel tanks. In a true kreisel, a circular tank has a circular, submerged lid. are "U" or semicircle shaped, usually without a lid. are a "double gyre" kreisel design, where the tank length is at least twice the height. Using two downwelling inlets on both sides of the tank lets gravity create two gyres in the tank. A single downwelling inlet may be used in the middle as well. The top of a stretch kreisel may be open or closed with a lid. There may also be screens about midway down the sides of the tank, or at the top on the sides. It is possible to combine these designs; a circular shaped tank is used without a lid or cover, and the surface of the water acts as the continuation of circular flow. It is now possible to start a jellyfish aquarium at home as easily as a regular fish tank.
Platy Fish 10 Types of Aquarium fishes for beginners
An introductory article into the many types of aquarium lighting available for fish only, planted and reef tanks. What kind of lighting do you need in your freshwater fish tank?
Platy Fish 10 Types of Aquarium fishes for beginners!
It's a good idea to have in mind what kind of freshwater aquarium fish you want to keep in your freshwater aquarium setup before you purchase an aquarium. Some fish only grow to be an inch or two, whereas other types of tropical fish can grow 12 or 13 inches or more in length! Knowing what kind of fish you want will help you decide the size of the tank they will need. If this is your first time with an aquarium, it may be a good idea to start with a 10 or 20 gallon aquarium setup for now and stock it with some smaller and hardier species.
Different types of Bottom Feeder Fish | The Aquarium Guide