Can be considered a good tetra for the freshwater fish beginner due to its hardy and peaceful nature.
Mollies are a versatile fish which can survive in both freshwater and saltwater aquariums, if the changes are made gradually. They are great for beginners because they are extremely hardy, and are not as aggressive as some other tropical fish. There are many too choose from, and the term ‘mollies’ is quite vague, since there are so many variations of size, color and optimal tank conditions.
Eels and eel-like fish are mostly . They mainly get active in the evening or after dark and are mostly bottom feeders. Primarily they will eat live food such as small crustaceans, mosquito larvae, worms, and fish. Some of these fish, such as the Spiny Eels and the Freshwater Eels, are also carrion eaters and may adapt to eating freeze dried and frozen proteins such as tubifex and bloodworms. Eels only need to be fed a couple of times a week and some may refuse food offered that often, eating only once every two or three weeks.Generally quite hardy, eels and eel-like fish adapt to most aquarium conditions. For the most part these fish are bottom dwellers, but many species are able to breathe air at the surface directly from the atmosphere. Some eels are great jumpers and most of them are excellent escape artists, getting through any available hole in the aquarium cover. Being both jumpers and able to breathe air, Swamp Eels have been known to cross great distances of land.Eels like to hide in caves or holes but also need plenty of space to swim. Many species, especially the Spiny Eels, also enjoy burrowing into the substrate. Because most eels are naked or have very small scales protecting their bodies it is important that the substrate is soft, such as fine sand and peat. They do best in a dimly lit aquarium or one with floating plants to help subdue the light.Though most eels can be kept together as juveniles they may become quarrelsome if they are over crowded. They become aggressive solitary predators as adults and will eat smaller and slower moving fish. They should only be kept with species of a similar size.Many of the true eels are only suitable to a home aquarium as juveniles because as adults they simply become too large. The life span also varies depending on the individual species.
Hardy fish to establish new freshwater tank? - The Planted Tank Forum
Fish: Hardy Freshwater Fish for Beginners
: South American Cichlids are a diversegroup of fish often referred toas New World Cichlids. Cichlids are hardy, easy to care for fish thatadd brilliant color to the freshwater aquarium. South American Cichlidsare found from Central America through South America and can becategorized into Dwarf Cichlids, Larger Amazonian Cichlids, and LargerNeotropical Cichlids, all of which have different care levels and tankrequirements. These larger species are mostly predatory fish that areterritorial innature and should be maintained in the semi-aggressive or aggressiveaquarium. South American Cichlids have very interesting personalitiesand are extremely intelligent fish with highly evolved parental skills,making them one of the most popular groups of aquarium fish.Barbs are good early freshwater fish to get because they are small and hardy, with high tolerances for condition changes. They’re also very active. However, they to new environments, so it can be a few weeks before they start to come out of their shell. Help them out by giving them plants and other places to hide.