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 12 of 28
Acclimate new goldfish promptly but gradually: float the bag to match temperature, then add tank water in stages over a fairly short session, because waste builds up quickly in a goldfish's bag and lingering there does it no favours. Net the fish into its roomy tank, throw the bag water away, and make sure extra…
Acclimate new corydoras gradually by floating the sealed bag to equalise temperature, then adding small amounts of tank water over time before netting the fish across and discarding the bag water. Keep the whole group together, because a cory separated from its shoal during the move feels far more exposed, and release…
Acclimate cherry shrimp by drip acclimation, not by floating and tipping them in, because these tiny invertebrates react badly to sudden changes in temperature and water chemistry. Set the opened bag or a small container beside the tank, run tank water in as a slow drip until the water has turned over several times,…
Acclimate bristlenose plecos slowly: float the bag to match temperature, then add small amounts of tank water over at least forty-five minutes, because these catfish are sensitive to sudden chemistry changes, before netting them in and discarding the bag water. Provide driftwood, caves, and dim light on arrival,…
Acclimate a betta by floating its sealed cup or bag on the tank for about twenty minutes, then adding small amounts of tank water every few minutes for half an hour or more before netting it in and throwing the transport water away. The receiving tank should be warm, cycled, and gently filtered, with a lid fitted…
Acclimate angelfish by floating the sealed bag for about twenty minutes to equalise temperature, then opening it and adding small amounts of tank water every few minutes for at least half an hour before netting the fish in and discarding the bag water. Keep lights dim, make sure the tank is spacious with tall plants…
Yoyo loaches thrive in warm water between 75 and 86 degrees Fahrenheit, kept most comfortably around 77 to 82, with a pH between 6.5 and 7.5. They are hardy once settled, but young loaches newly home from a shop are sensitive to a cold tank or a sudden pH shift, so acclimate them slowly and test before you top up.…
Scissortail rasboras do best in water held between 73 and 79 degrees Fahrenheit, with a pH between 6.0 and 7.5 and a target near the slightly acidic middle of that range. These active schoolers come from slow Southeast Asian streams, so warmth matters less than steadiness, and a heater that holds one temperature…
Peppered corydoras suit water from about 64 to 77 degrees Fahrenheit — one of the widest, coolest ranges of any cory — with a pH between roughly 6.2 and 7.2. That cool tolerance makes them one of the few bottom fish happy in an unheated temperate tank, and forcing them into hot discus-style water is the main way…
Peacock cichlids suit water around 76 to 82 degrees Fahrenheit with a pH between roughly 7.6 and 8.6, replicating the hard, alkaline water of Lake Malawi where they live over sand and rock. That alkaline demand is the opposite of most tropical community fish, so peacocks belong in a Malawi setup rather than a planted…
Panda corydoras suit cooler water than many community fish, about 71 to 77 degrees Fahrenheit, with a pH between roughly 6.0 and 7.4. Running a panda group at the hot end of a tropical tank shortens their lives quietly, so a mid-seventies compromise already asks a lot of them. Keep them in a group on soft substrate,…
Oscars suit water around 77 to 81 degrees Fahrenheit in most home tanks, within a wider tolerance of roughly 74 to 81 degrees, and a pH between about 6.0 and 8.0. That breadth makes the oscar sound easy, but a fish this large turns small chemistry drift into a big waste load, so stability and filtration matter more…
Kribensis suit water around 75 to 79 degrees Fahrenheit with a pH between about 5.0 and 7.5, though most home pairs thrive near the middle of that pH span in ordinary treated tap water. This West African river cichlid is prized for tolerating a range of conditions while still breeding in a cave, but tolerance is not…
Honey gouramis suit water around 72 to 82 degrees Fahrenheit with a pH between about 6.0 and 7.5, colouring best toward the warm, slightly soft side of that window. A settled male turns the deep honey-orange the species is named for, while a fish kept cool or in hard, alkaline water often stays pale and shy. Keep…
Hillstream loaches suit cooler water than most tropical fish, about 68 to 75 degrees Fahrenheit, with a pH between roughly 6.5 and 7.5 — and the temperature ceiling matters because warm water holds less of the oxygen these river fish constantly need. Flow is part of the answer, not an accessory: a hillstream loach…
Ghost shrimp suit a broad window of about 65 to 82 degrees Fahrenheit and a pH from roughly 6.5 to 8.0, which is why they settle into so many community tanks without special equipment. Room-temperature water often needs no heater at all, but mineral content matters more than the headline numbers, because a shrimp…
Firemouth cichlids suit water from about 75 to 86 degrees Fahrenheit with a pH between roughly 6.5 and 8.0, and most home tanks do well held near 78 to 80 degrees at a pH close to 7.0 to 7.5. That warm, near-neutral combination supports the red throat and belly the species is named for, which fade noticeably in a cool…
Espei rasboras suit water around 73 to 82 degrees Fahrenheit with a pH between about 5.5 and 7.0, and they look and behave best toward the soft, mildly acidic middle of that window. These copper-bodied schoolers come from slow forest waters tinted by leaf litter, so bright, hard, alkaline conditions tend to wash out…
Endler's livebearers suit water from about 74 to 82 degrees Fahrenheit with a pH between 7.0 and 8.5, leaning toward the warm, harder side that mirrors their Venezuelan pools. Stability matters more than chasing the exact top of that range, because these tiny fish breed, feed, and colour up poorly when heat swings…
Dwarf rainbowfish, the praecox rainbow, suit water from about 74 to 79 degrees Fahrenheit, with a pH from roughly 6.5 to 7.5, and they colour best near the middle of both ranges in a well-lit planted tank. Males flash neon blue bodies and red or yellow fins while displaying in the morning, so judge their condition…
Discus suit the warmest water of any common community fish, about 82 to 88 degrees Fahrenheit, with a soft, acidic pH from roughly 6.0 to 7.0, and tank-bred fish accept the upper part of that pH span. Warmth is not optional detail for discus, because cooler water suppresses their appetite and immune response even when…
Convict cichlids suit water from about 72 to 80 degrees Fahrenheit, with a pH from roughly 6.5 to 8.0, and they tolerate that span more easily than almost any other part of their care. The numbers are the simple part; the real planning is territory and breeding, because a pair will claim a cave, dig up the substrate,…
Clown plecos suit water from about 73 to 82 degrees Fahrenheit, with a pH from roughly 6.8 to 7.6, and they need real driftwood in the tank as much as they need those numbers. This small pleco rasps wood fibre as part of its diet and hides in it by day, so a tank without wood fails the fish even at perfect readings.…
Bronze corydoras suit water from about 72 to 78 degrees Fahrenheit for everyday keeping, tolerating the high sixties to low eighties briefly, with a pH from about 6.0 to 8.0. Keep them on sand in a group of six or more, and the temperature detail that matters most is avoiding sudden drops during water changes, which…
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