Finally, the aquarium is purchased, plants are planted, and fish are introduced. The joy of a novice aquarist knows no bounds, as their long-cherished dream has come true. But you should never forget that live aquarium fish and other inhabitants of the underwater world are living creatures and are susceptible to various diseases.
Discus fish are rightfully considered the kings of freshwater aquariums, but their care requires special caution. Discus acclimation is a critically important stage that determines the success of further maintenance of these noble fish. In my 15 years of experience keeping South American cichlids, improper acclimation is the main cause of stress and death in newly acquired discus.
Angelfish (Pterophyllum scalare, Lichtenstein, 1823) are among the most iconic and recognizable freshwater aquarium fish in the world. Belonging to the family Cichlidae, they are native to the slow-moving and still waters of South America — the Amazon, Orinoco, and Essequibo river systems and their tributaries. Alongside the common angelfish P. scalare, the genus includes the altum angelfish (Pterophyllum altum) and Leopold’s angelfish (Pterophyllum leopoldi), though it is P. scalare that forms the basis of virtually all cultivated aquarium varieties.
Molly fry can appear in your aquarium almost out of nowhere — even if you never planned to breed your fish. Mollies (Poecilia spp.) are livebearers, and females can store sperm for months, producing successive batches of fry without any additional mating. That’s why it pays to know exactly what to do when you suddenly find dozens of tiny fish darting around your community tank.
Molly fish (Poecilia spp.) are among the most popular livebearers in the hobby, and molly fish breeding is a topic that fascinates both beginners and experienced aquarists alike. At first glance, livebearers seem to reproduce effortlessly — just add a male and female to a tank and wait. In reality, mollies are a notable exception to this rule. Without attention to several key factors, producing healthy fry consistently can be surprisingly difficult.
Flowerhorn cichlids are unique ornamental fish developed through selective breeding in Malaysia and Thailand during the 1990s. These cichlids are hybrids of several American cichlid species, including Amphilophus citrinellus and Amphilophus labiatus. In my experience, Flowerhorn fish remain one of the most impressive and controversial species in modern 2026 aquaristics.
Aphyosemion filamentosum “Ikeja” is a distinctive color variation of the well-known species A. filamentosum, inhabiting the Lagos area of Nigeria within a radius of approximately 30 kilometers. This killifish attracts aquarists with its unusual coloration and compact size, making it an excellent choice for species-specific nano setups.
Aphyosemion wachtersi is one of the most colorful representatives of the Aphyosemion genus, deserving attention from aquarists due to its relatively straightforward breeding process. This small killifish is notable for spawning without the egg diapause characteristic of most other aphyosemions.
