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.
297 answers in Young Pets — page 6 of 13
In the first week, young corydoras typically begin as a nervous huddle in one shaded corner, then gradually loosen into a proper shoal that snuffles through the substrate, rests together on open sand, and makes occasional quick dashes to the surface for a gulp of air. Expect feeding confidence to build over days,…
In the first week, a young betta typically alternates between cautious exploration of every plant and corner, long rests on leaves near the surface, and increasingly confident appearances at a regular feeding spot. Expect appetite to build over several days, colour to deepen as stress fades, and possibly some…
In the first week, young angelfish usually move through a clear sequence: a day or two hanging quietly near plants or the filter, fins held carefully, followed by short exploratory circuits and a growing interest in food. Expect some individuals to claim the best corner early, with mild chasing as a first hierarchy…
A young white cloud mountain minnow spends its first year as an energetic cool-water schooler that asks remarkably little of its keeper. Expect rapid early growth, red and gold fin colour improving with condition, constant mid-water activity, and, in a planted tank, eggs scattered among fine leaves with a few fry…
A young sparkling gourami spends its first year becoming a jewel you have to earn sightings of, flashing turquoise and gold speckles when the light catches it among dense plants. Expect shyness early, growing boldness at feeding time, occasional faint croaking sounds from sparring or courting fish, and males building…
A young scarlet badis spends its first year as a tiny, deliberate predator that rewards keepers who slow down to watch it. Expect a shy start among the plants, males gradually developing red barred colouring, and a firm preference for small live or frozen foods over anything that comes in a tub. It claims a small…
A young rummy-nose tetra spends its first year as one of the tightest-schooling fish in freshwater keeping, moving as a single ribbon through the middle of the tank. Expect washed-out colours at first, then a deep red face and bold black-and-white tail once the school feels secure and the water suits it, because that…
A young rice fish, or medaka, spends its first year proving why keepers call it quietly tough: it settles fast, schools calmly, and tolerates a wider range of conditions than most small fish. Expect steady growth, males and females becoming easier to tell apart, and, in warm bright conditions, females carrying…
A young pea puffer spends its first year turning into a watchful little hunter with a personality far larger than its size. Expect hovering, eye-first investigation of every snail and corner, bold begging at the glass once it learns the feeding routine, and firm territorial behaviour toward other puffers where…
A young Norman's lampeye grows from a near-transparent sliver into a slim silver fish whose eyes catch the light with a bright blue shine. Expect a peaceful school that lives near the surface, tightens together when startled, and loosens into confident grazing on tiny foods once the tank feels safe. They are capable…
A young nerite snail spends its first year doing one job very well: grazing. Expect slow, steady growth, long hours rasping algae and biofilm from glass, wood, and rock, and a patterned shell that thickens as long as the water supplies enough minerals. You may also find small white eggs dotted on hard surfaces, but…
Expect a young hillstream loach's first year to be a slow settle rather than a growth spurt: it will spend its days pressed to glass, stones and wood in the current, grazing biofilm, and it needs cool, fast-moving, oxygen-rich water and a mature tank with real algae growth from day one. Youngsters are often thin on…
Expect a young fork-tail rainbowfish's first year to bring out its two signatures: bright blue eyes that show early, and, in males, deeply forked fins edged in yellow that they flap like paddles when displaying to each other. The school matures into active, peaceful mid-water fish of modest size, spawning in morning…
In its first year a young endler's livebearer matures at sprint speed: males show their neon streaks and black markings within weeks and stay small, females grow larger and plainer, and a mixed group will produce fry continuously all year without any encouragement from you. Expect population management to become the…
A young ember tetra's first year is about colour and confidence rather than size: it will barely grow past thumbnail length, but its translucent orange deepens into a glowing ember as it settles, especially in a good-sized school under plant shade. Expect new youngsters to hide for their first days, then emerge as a…
Expect a young discus's first year to be an intensive growth project: several protein-rich meals a day, warm water held high and steady, and large, frequent water changes to match, all aimed at growing a deep, round body rather than a stunted oval. A pecking order will form, and the smallest fish need protecting at…
A young clown killifish lives its life in the top inch of the tank and on a faster clock than most fish: expect rapid maturing, with males developing bold black banding and a flame-tipped, lyre-shaped tail within their first months, and plan for a lifespan that may be only a little beyond the first year. They are…
In its first year a young celestial pearl danio grows from a nearly colourless sliver into a speckled jewel: males develop the starry pearl spots, deep body colour and orange-red fins the species is named for, while females stay softer with a dark spot near the vent. Expect a shy start — youngsters hug dense planting…
Expect a young cardinal tetra's first year to split in two: a delicate settling-in period where stable, soft water and gentle handling decide everything, followed by surprising hardiness once established, with the full-length red stripe deepening into one of the brightest colours in a small tank. Cardinals grow…
A young bumblebee goby spends its first year small: it will stay a thumbnail-sized, black-and-gold banded bottom-dweller that perches on its fused pelvic fins and defends one chosen cave against all comers of its own kind. The year's main challenges are social and culinary — provide at least as many caves and shells…
Expect a young boesemani rainbowfish to spend much of its first year looking disappointingly plain: the famous split colouring — steel blue-grey at the front, blazing orange behind — develops slowly in males and may not peak until well past the first year. What you get immediately is size and energy, because…
In its first year a young Apistogramma grows from a drab, hard-to-sex juvenile into a strongly territorial dwarf cichlid: males develop the colour, fin extensions and attitude the species is famous for, while females turn a rich yellow when they are ready to breed. Expect a settled fish to claim a cave and the floor…
Expect a young amano shrimp to spend its first year grazing almost constantly, growing in steps each time it sheds its shell, and becoming one of the boldest cleaners in the tank. Females grow larger than males and develop a visible saddle of eggs, but the eggs will not produce young in fresh water, because amano…
A healthy young betta's first six months follow a readable arc: steady size gains and a deepening body first, then colour flooding in and fins lengthening — dramatically in males — alongside bolder behaviour, surface-breathing confidence and bubble-blowing as maturity approaches. Track growth against the individual…
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