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.
649 answers in Home & Lifestyle — page 18 of 28
Keep Congo tetras in a group of at least six: the males' long, flowing fins and iridescent colour only develop properly with rivals to display to, and the whole school needs tank length to cruise in formation. Congos grow far bigger than most tetras - males reach around three inches - so a group belongs in a long,…
Chili rasboras need a bigger group than their size suggests: keep at least eight to ten, because a fish that barely reaches an inch long only feels safe inside a crowd of its own kind. In a proper shoal their red deepens and they drift out into the open water; in twos and threes they wash out, hug the plants and…
Keep celestial pearl danios in a group of at least six, and aim for eight to ten with more females than males: the males spar and display for rivals, so extra females spread that attention around and keep any one female from being chased ragged. These are shy, tiny fish that colour up properly only in a planted group,…
Cardinal tetras should live in a school of at least six, with ten or more giving the best colour and confidence: that full-length red stripe only glows when the fish feel secure in numbers. Cardinals are less forgiving of new or unstable tanks than neon tetras, so add the school to a mature setup and keep the water…
Keep black skirt tetras in a group of at least six, and choose eight to ten if the tank allows: this tall-bodied schooling tetra is noticeably calmer in a proper school, and its well-known fin-nipping habit fades when there are enough of its own kind to hold its attention. A lone black skirt or a pair often turns shy…
Write the plan around the three things a tank-sitter can actually get wrong: how much food, what to leave alone, and when to call you. Give exact portions for each day with a firm no-extra-feeding rule, because a weekend of generous handfuls fouls the water faster than almost anything else. List what runs itself -…
Aquarium chores split fairly when every job has a name, a day and a visible finish line: list the real tasks first - feeding, water changes, glass cleaning, filter rinses, water tests - then rotate the unpopular ones on a fixed cycle so nobody is permanently on bucket duty. Match jobs to ability, write the exact…
Protect your fish from fireworks by softening both the vibrations and the flashes: close the curtains, keep one steady low light on in the room so bursts outside contrast less against the tank, and make sure the lid is fully secure, because startled fish bolt and jump. Keep the tank's stand undisturbed, never tap the…
Zebra danios are the most forgiving fish you will ever move, and the whole school should travel together: their confidence comes from the group, so carry them in one roomy container of their own tank water with a secure lid, because even these hardy fish jump when startled. Their tolerance of a wide temperature range…
Move your siamese algae eater in a covered container, never an open bucket: this fast, restless swimmer is a determined jumper, and most moving-day escapes happen in the few minutes a lid is left off. Drain the tank halfway, corner the fish calmly with two nets, and transport it in its own tank water with plenty of…
A pearl gourami moves best when its journey is calm and airy: bag it on its own in its own tank water with a generous space of air above the surface, because this labyrinth fish breathes air at the top and startles easily in bright, noisy conditions. Skip food the day before, keep the container dark, and have the new…
Prepare your kuhli loach by planning the catch, not the box: this nocturnal bottom-dweller buries itself in substrate and hides inside decor, so it travels best when herded gently into a container of its own tank water after the tank is half-drained and every ornament has been checked. Skip food the day before, keep…
Harlequin rasboras draw confidence from the school, so the whole group travels together in one container of tank water with a plant sprig, never split into bags where a shy fish panics alone. Fast them for a day, set the new tank up first with plants and cover ready, its water close to what they know at around 73 to…
Guppies are small livebearers with fast lives, so prepare them by sex and by condition: males travel together happily, but a heavily pregnant female should ride in her own container with a plant sprig, because stress can make her drop fry early. Fast the group for a day and set the new tank up first, at their settled…
Goldfish are heavy waste producers, so prepare for volume: fast yours for a day or two, and transport each fish in a sturdy lidded tub with plenty of tank water and a large air space above it, not a bag. Have the new tank or pond fully set up first, with strong filtration running and the old filter media moved wet,…
Corydoras are social bottom-dwellers, so prepare them as a shoal: the whole group travels together in one roomy container of tank water, with generous volume, because stressed corydoras foul crowded water unusually fast. Fast them for a day, set the new tank up first with soft sand and hiding places ready for their…
For cherry shrimp, a move is about water, not distance: tiny and acutely sensitive to changes in temperature and chemistry, they need arriving water that matches home water closely. Travel the colony together in tank water with a clump of moss to cling to and graze on, scooping them with a cup rather than chasing…
Prepare a bristlenose pleco by moving his hiding place rather than the fish: he is nocturnal and wedded to his driftwood, so if the wood travels submerged in a lidded tub of tank water, he may ride inside it undisturbed. Use a hard container, never a bag his spines can puncture, and fast him for a day so the tub water…
A betta travels in a lidded cup of his own tank water, with a generous air gap above the surface because he breathes air through his labyrinth organ. Set his tank up first at the new home, warm and conditioned at his usual 76 to 80 degrees, with his decor ready. Fast him for a day, then keep the cup dark, upright and…
Angelfish are tall, deep-bodied and stress-prone, so set the new tank up first, with conditioned water at their usual 76 to 80 degrees and the old filter media kept wet in tank water so its bacteria travel too. Fast them for a day so the travel water stays clean, then bag each adult separately in a double bag, one…
Start by listing every task the tank needs, feeding, lights, checks, water changes and filter care, and sort each by how time-sensitive it really is; most tanks need far less daily attention than owners fear, provided the weekly work never slips. Put the lights on a timer set to the photoperiod the tank already knows,…
Plan the day around one rule: clean everything except the biology, because the bacteria in your filter media and substrate are what keep the water safe. Stage a covered holding tub of tank water with a heater and air stone before any fish moves, gather every bucket and tool first, and sketch the new layout so no…
Zebra danios handle cool water better than most tropical fish, but a winter room that swings between warm afternoons and cold nights is harder on them than steady cool water. Fit a reliable heater sized for the tank to hold the low-to-mid seventies, and check a separate thermometer morning and evening, because a…
Zebra danios are hardy cool-water fish that do best around 64 to 74 degrees, so a heatwave hurts them twice: the water warms past their comfort and warm water holds less oxygen for a very active fish. Shave off a few degrees gently: float a sealed bottle of frozen water, run a small fan across the surface, switch…
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