3,895 answers about fish & aquatics
A healthy aquarium is a balanced one — water chemistry, filtration, stocking and feeding all work together, and most fish problems start with the water. This page gathers the fish and aquatics library of KinsLe Answers in one place, organized by topic for freshwater and saltwater keepers alike. Every answer is original, written by KinsLe, and tied to a real KinsLe feature.
562 answers in Choosing & Adopting — page 11 of 24
Find a good guppy breeder through aquarium clubs and show circles, where keepers maintain named strains over generations and can tell you exactly how a line is bred. Ask whether the strain is kept pure, how males and females are separated as they grow, and what the fish are eating, and choose bright, straight-spined…
Find a good goldfish breeder by deciding first whether you want a single-tailed fish or a fancy variety, because the best breeders specialise in one or the other and can show you healthy, smooth-swimming parent fish. Club shows, pond societies and specialist breeders are the strong routes, while rescues are full of…
Find a good corydoras breeder through aquarium clubs and specialist keepers who label their fish by exact species, because a cory sold under the wrong name may need different water and different schoolmates. A good breeder keeps each species separately, can say whether the fish are tank-bred or wild-caught, and sells…
A good cherry shrimp breeder is usually a hobbyist running a dedicated shrimp tank, and locally bred shrimp are the best buy because they are already raised in water like yours. Ask what line the shrimp come from, how the colony is culled to hold its red colour, and what water the tank is kept in, and choose a mixed…
Good bristlenose pleco breeders are usually fellow hobbyists: bristlenoses breed so readily in home tanks that aquarium clubs and local keepers are the best sources, often with youngsters raised in water much like yours. Ask which Ancistrus type the parents are, how large the adults grow, and what the youngsters eat,…
Find a good betta breeder by looking for a small-scale keeper who breeds a few spawns at a time, can tell you a fish's parents, tail type and age, and keeps males in proper individual housing rather than warehousing them. Aquarium clubs, betta societies and reputable local shops are the reliable routes in, and rescues…
Find a good angelfish breeder through your local aquarium society or club auctions, where breeders sell fish they raised themselves and can show you the parent pair. A good breeder knows the fish's variety, age and water conditions, raises straight-finned, upright-swimming youngsters, and welcomes questions; rescues…
A white cloud mountain minnow stays genuinely small, reaching only about one to one and a half inches as an adult. Unlike many fish sold tiny that grow large, white clouds finish close to the size you buy them, which makes them one of the few honest nano fish. They are schooling, cool-water fish, so plan for a group…
A tiger barb grows to about two to three inches as an adult, with most home-aquarium fish settling near two and a half inches. The measurement understates them: adults are deep, round-bodied and constantly on the move, so a school needs more swimming room and more robust tankmates than their length alone implies. Keep…
A serpae tetra stays small as an adult, topping out at roughly one and a half to two inches. What matters more than that modest length is the deep, tall body it grows into and its reputation for nipping fins when the school is too small or tankmates are slow and long-finned. Buy serpaes as a proper school and match…
A scissortail rasbora grows much larger than the tiny silver fish usually sold in shops, reaching about five to six inches as an adult. That length arrives on a slim, fast body, and because scissortails live in schools, the real commitment is a group of adults sweeping the length of a long tank rather than one small…
An adult rummy nose tetra reaches about two to two and a half inches long, with a slim silver body, a bright red head, and a black-and-white striped tail. That red nose doubles as a condition gauge: it blazes in a settled, healthy school and washes out when something is off. Rummies are among the tightest schoolers in…
An adult rosy barb reaches about four to five inches long in a home aquarium, making it one of the largest of the commonly kept barbs and far bigger than its inch-long shop appearance suggests. Males deepen to a rich rosy red when settled and displaying, while females stay larger, rounder, and more golden. A fish this…
An adult peppered corydoras reaches about two and a half to three inches long, with females growing noticeably larger and broader than males. It is one of the hardiest and longest-established corydoras, tolerant of cooler water than many tropical tankmates prefer. Peppers live on the bottom in social groups, foraging…
An adult panda corydoras reaches about one and a half to two inches long, making it one of the smaller corydoras, with its cream body, black eye patch, and dark tail-base marking. Females grow slightly larger and rounder than males. Pandas are social bottom dwellers that shuffle along the substrate in groups, so floor…
An adult leopard danio reaches about two to two and a half inches long, its spotted pattern replacing the stripes of its zebra danio relatives. Long-finned varieties look larger because of their flowing fins, but the body stays in that same range. Leopard danios are tireless surface swimmers, so tank length and a…
An adult lemon tetra reaches about two inches long, with a taller, more diamond-shaped body than many tetras of similar length. Males show the stronger lemon-yellow colour and a bolder black edge on the anal fin, while females grow slightly fuller. Their colour only fully develops in settled groups under softer light,…
An adult honey gourami reaches about two to two and a half inches long, staying one of the smallest and calmest of the gouramis. Males develop the warm honey-gold colour with a dark throat when settled, while females remain softer silver-gold and grow slightly rounder. A single pair or small group fits a modest,…
An adult gold barb reaches about two and a half to three inches long, with a sturdy, deeper body than its slim juvenile shape suggests. Females grow a little larger and rounder, while males colour up more intensely, especially when settled. Gold barbs are busy, social midwater fish, so plan for a group and enough…
An adult glowlight tetra reaches about one and a half to two inches long, with females growing a little fuller-bodied than males. Its defining feature is the glowing orange-red stripe running from nose to tail, which shows best in a settled school under soft light. Glowlights stay small enough for modest tanks but…
An adult dwarf rainbowfish, the praecox rainbow, reaches about two to two and a half inches long, with deep-bodied males showing a silvery blue body and red-orange fins. Females stay slightly smaller and carry yellowish fin edges. They are active, surface-leaning schoolers, so even at this modest size they appreciate…
An adult Congo tetra reaches about three inches long, with males growing slightly larger than females and developing longer, flowing fin edges. That makes Congos substantially bigger than the small tetras many people picture, so they need real swimming length rather than a compact nano setup. Keep them in a group so…
An adult chili rasbora stays tiny, reaching only about three-quarters of an inch long, with a slim body that barely registers beside larger community fish. That small size is exactly why groups matter more than individual presence: a single chili looks lost, while a proper school reads as a drifting red cloud. Plan…
A celestial pearl danio grows to only about an inch as an adult — one of the smallest fish in the hobby — with males and females finishing at much the same length. Females look rounder when full of eggs, while mature males carry the richer colour, with bright spotting over a deep blue-grey body and orange-red fins.…
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