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 23 of 28
A nervous fish calms down when the world outside the glass becomes predictable, so build the kitchen routine around fixed points: lights on and off at the same times, feeding at the same times by the same calm approach, and no tapping on the glass, ever. Give the fish deep cover — tall plants and a backing on the rear…
An adult goldfish is fine unfed over an ordinary weekend, so weekends mainly need the filter and light timer checked on Friday and the food tub kept where helpful visitors cannot reach it. Holidays are different: line up one named carer, leave food pre-portioned in labelled pots so nobody can overfeed, and put a…
For most home aquariums, six to eight hours of light a day is the sweet spot: planted tanks sit at the top of that range, and fish-only tanks can manage on less. What matters more than the exact figure is consistency, so put the light on a timer and keep the same schedule daily, with a proper dark period overnight —…
Set the tank running at the new home before the fish travel if you possibly can, and move the fish last, in strong bags or lidded buckets kept dark and at a steady temperature. The real cargo is the filter bacteria: keep filter media and gravel wet in old tank water during the move, never rinsed under a tap, so the…
Pick the biggest sturdy tub you have room for — at least 40 gallons for a pair of fancy goldfish — and site it where it gets morning sun but afternoon shade, because a shallow tub heats and cools far faster than a pond dug in the ground. Add a small pump and filter, floating plants for shade and cover, and a net over…
A low-tech planted tank works by matching plant appetite to what the tank naturally supplies: choose easy plants such as anubias, Java fern, cryptocoryne and vallisneria that grow steadily on fish waste and modest light. Give them six to eight hours of moderate LED light a day, a nutrient-rich substrate or root tabs…
Build the tank to imitate a shallow mountain stream: strong one-way flow, highly oxygenated water and smooth stones coated in algae. Hillstream loaches graze biofilm from rocks all day, so set the tank up and let it mature until the stones green over before adding them, rather than putting loaches into a sterile new…
Buy the adult tank now, not a starter tank: one fancy goldfish needs about 20 gallons, with roughly 10 more for each additional fish, while single-tailed goldfish grow so large they belong in a pond. Match it with filtration rated above its volume, because goldfish eat heavily and produce waste to match, and keep the…
Start with a long 20-gallon tank if you can, because zebra danios are fast, restless swimmers who need length to race along, and always fit a tight lid because they jump. Cycle the tank fully before the fish arrive, add fine gravel or sand, plants along the back and sides, and open water in the middle, then bring home…
A first siamese algae eater tank is planned around length and correct identification. Make sure you are buying a true siamese algae eater - black stripe running unbroken from nose through the tail fin, resting propped on its fins - not a lookalike. Then give it at least 30 gallons with swimming length, clean…
A first pearl gourami tank is a calm, warm, planted setup of at least 30 gallons. Keep the surface gentle with floating plants and a baffled filter, because pearl gouramis are labyrinth fish that breathe at the surface and build bubble nests there, hold the water around 77 to 82 degrees, and give them planting and…
A first kuhli loach tank is built around sand, cover and a lid with no gaps: give a group of at least six kuhlis a 20 gallon long tank with soft sand or very fine smooth gravel they can burrow into, piles of wood, stone and leaf litter to hide in, and warm, gentle water. Seal every gap around the lid and filter pipes,…
A first harlequin rasbora tank is a soft-water, planted setup built around the shoal. Keep at least eight to ten harlequins together in 20 gallons or more, with warm water around 73 to 77 degrees, gentle flow, dense planting at the back and sides, and open swimming room in front. Their copper-orange colour and black…
A first guppy tank is the forgiving end of the hobby: a cycled 10 to 20 gallons of warm, steady water, some plants, and a sensible mix of fish. Buy two or three females for every male so the males' constant attention is spread out, add floating plants or fine foliage where newborn fry can hide, and plan from day one…
A first goldfish tank is mostly about volume and filtration, because goldfish grow large and produce waste like fish three times their size. Start with fancy goldfish in at least 30 gallons for the first fish, with oversized filtration, no heater in a normal room, and simple decor they cannot hurt themselves on or…
A first corydoras tank is designed around the bottom: soft sand they can sift without shredding their barbels, open floor space, and a group of at least six of the same species, because corydoras are social fish that stress alone. A 20 gallon long tank suits most common species, with gentle filtration, plants or wood…
A first cherry shrimp tank succeeds on patience and stability rather than equipment. Set up a small planted tank of 5 to 10 gallons with a gentle sponge filter, moss and fine plants, then let it mature for several weeks so biofilm - the shrimp's real food - coats every surface before the shrimp arrive. Start with a…
A first bristlenose pleco tank is planned around wood, hiding places and the surprising amount of waste one small pleco produces. Give it 20 to 30 gallons, a real piece of driftwood it can rasp on - the wood fibre is part of its diet - plus a cave or two, decent filtration and weekly water changes. Feed it properly…
A first betta tank needs warmth, calm water and a lid more than it needs size for its own sake. Give a single male betta at least 5 gallons - 10 is easier to keep stable - with a heater holding 78 to 80 degrees, a gentle filter that barely moves the surface, and soft silk or live plants he can rest on without tearing…
An egg-scattering tetra breeding tank is a small, dim, deliberately simple setup whose main job is to keep the parents from eating their own eggs. Use a 10 to 20 gallon tank with soft, slightly acidic water, thickets of fine-leaved plants or spawning mops, and a layer of marbles or a mesh grille on the bottom so the…
A blackwater-style tank recreates the tea-stained, soft and gently acidic water of forest streams: start with soft source water — rainwater prepared safely or remineralised pure water, since botanicals cannot soften hard tap water on their own — then add tannins gradually with driftwood, dried leaves and other…
An enriching betta tank gives him things to do: layers of live or silk plants to explore, a hide at more than one level, leaf litter and botanicals on the substrate to pick through, and a patch of floating plants that dapples the light. Keep a gentle flow so he is not fighting current to enjoy it all, and change the…
Scape around how a betta actually lives: he patrols the top and middle, rests on broad leaves near the surface, and threads through cover rather than crossing open water. Build height at the back with tall plants, give him a leaf hammock or wide anubias leaf just under the surface, a cave or driftwood tangle at…
Put the lights and the CO2 solenoid on separate smart plugs with separate schedules: the CO2 switches on a little before the lights so the water is enriched as the plants wake, and off before lights-out so gas does not build up overnight; the lights run one consistent photoperiod. Filters and heaters never go on a…
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