For those who are new at maintaining fish tanks, cold water aquarium fish are the best choice. These fish are easy to maintain and you will not have a hard time looking for them. They do not require special feeding because they do not need any heater for their tanks. Also, these fish are more comfortable than warm water fish since they can survive even in waters that are below the freezing point. These fish are also easier to maintain since they don't need heaters as much as other fish species.
However, there are some things - that you should know about cold water aquarium fish before keeping them. For instance, you should only keep one species per tank. This is to make sure that they are not stressed out due to the sudden changes in temperature. Also, it is best to choose species that are good additions to your tanks so you don't waste your money and time trying to introduce different species into your aquarium.
Choose an appropriate filter for your aquarium - There are filter systems that attach to the tank. There are also filter cartridges that you can attach to the filter. There are also filter fixtures and pumps available that can be attached to your aquarium. These filter fixtures are especially good for bigger tanks where there are several tetras and other community members that can crowd your tank.
Crayfish are another good addition to your tank: They are beautiful to look at and easy to maintain. However, they tend to be quite aggressive. If you are only getting crayfish as pets, then you can buy fish that are easier to look after. One good option would be the brightly colored Pacific Halibut.
You may also opt to purchase fish with different shapes and colors: Some prefer triangular and round fish to add more variety to their tanks. Others prefer to fish with different colors that are a different color than their regular counterparts. Whatever you decide, however, make sure that you have enough room for all of your fish to swim about.
The type of fish you decide on depends on the environment - and your tank's ability to tolerate their presence. Try to find a balance between size, color, movement and diet. If you are starting an aquarium from scratch, you may want to stick with species that are easy to care for and can tolerate different temperatures and tank conditions.
If you already have an established aquarium and want to introduce more exotic species, choose carefully so that your new friends do not have a difficult time adjusting to their new home.
