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.
351 answers in Feeding & Nutrition — page 13 of 15
Overfeeding announces itself in leftovers: food still drifting or sitting on the substrate several minutes after feeding means the last portion was too big, whatever the fish's begging suggests. The tank keeps the receipts, since glass and plants that film with algae between cleans, water that clouds a day after…
Shy fish miss out because the food is gone where they are willing to go, so take the food to them instead of asking them to join the scrum. While the bold fish are busy with a first scatter at the surface, use a pipette or feeding tongs to place sinking food right beside the shy fish's cave, plant thicket or shaded…
Frozen bloodworms and brine shrimp are treats to handle like the raw food they are: thaw a portion in tank water, never under the tap or in a microwave, and feed it the same day. Rinse brine shrimp in a fine net before feeding, especially in freshwater tanks, so the salty packing water stays out, and never refreeze a…
The safest arrangement is a person, not a gadget: ask a trusted friend or sitter to feed, and pre-portion every day's food into labeled pots, so helping generously cannot turn into overfeeding. Leave portions at their normal size, because a week lean is far safer than a week of double rations fouling the water. For…
Algae wafers work best dropped in after lights-out, when plecos and otocinclus come out to graze and the day-active fish are settling. Break the wafer into two or three pieces and place them in separate spots, one near the pleco's cave or driftwood and the others spread along the bottom, because a single wafer in one…
In a mixed pond the big fish win by physics, with wider mouths, faster charges and more food per gulp, so the smallest fish need their own feeding zone and their own size of food. Scatter the main feed at one end for the koi and larger goldfish, and at the same moment put smaller, finer food at the sheltered end near…
A long-finned betta is a slow swimmer, and sinking food is usually on the substrate before he has crossed the tank, so move his meals to the surface, where bettas are built to feed. Offer floating pellets one piece at a time directly in front of him, inside a feeding ring if the current spreads them, and pause the…
A shared family tank stays correctly fed when the chart answers three questions at a glance: who feeds, what exactly they give, and whether it has already been done. Build it as a simple grid, days down the side and the tank's feedings across the top, and write portions as counts anyone can copy, like two wafers or…
A corydoras that is eating enough carries a gently rounded belly, fullest just behind its pectoral fins, and passes short, dark, compact droppings that roughly match the color of its food. Warning signs run the other way: stringy pale or white waste trailing behind the fish, a pinched hollow where the belly should…
Live food can be superb enrichment for cichlids — it switches on the hunting and picking behaviour dry food never asks for — but the sourcing decides whether it is nourishment or a parasite delivery service. The safest live foods are the ones you raise yourself: daphnia, grindal worms and baby brine shrimp from your…
Feeding blocks are the risky option, not the safe one: the block slowly dissolves whether the fish are eating or not, and in a small or lightly filtered tank the uneaten food rotting around it can cloud the water and push ammonia up while nobody is home to notice. Most healthy adult fish handle a week without food far…
Corydoras eat from the floor, so feed them food that sinks and lands: sinking wafers and pellets dropped straight to the substrate, plus frozen foods placed down where the group shelters instead of scattered at the surface. Feed at least part of that bottom food after lights-out, when the corys are active and faster…
Ask the seller what it was raised on before you try anything else, because a newly bought angelfish often refuses food it does not recognize rather than food it dislikes. Offer that familiar food first, then bridge toward your own staple with foods from the live and frozen classes, keeping frozen items such as…
Koi digestion follows the water: in warm summer water they feed actively and can take several modest meals a day, while as the water cools their appetite and digestion slow together. In spring, restart feeding lightly with easily digested food once the water warms, then taper the amount and protein again through…
Keep frozen bloodworm, daphnia and brine shrimp in the freezer, and live daphnia or baby brine shrimp when a trusted source offers them, alongside the staple food. Offer these foods a few times a week in small portions, thawing frozen items first and rinsing them before feeding, and remove anything uneaten promptly,…
Treat holiday blocks with suspicion: the plaster-style blocks dissolve unevenly, can cloud the water and shift its chemistry, and most fish barely eat from them — a fasting week is safer for healthy adult fish than a bad block. Gel-based and vegetable slow-release foods are the safer end of the range, but only once…
Grow grazing at home: keep smooth stones in a jar of water on a sunny sill until they green over, then rotate a mature stone into the tank and return the grazed one to the jar. Add blanched vegetables on clips — zucchini, cucumber and sweet potato — and put algae wafers into the same rotation, so biofilm and vegetable…
Nothing is fed still frozen solid, but the two groups part ways after thawing in a little tank water: bloodworm and any food packed in cloudy liquid get rinsed in a fine net after thawing, while brine shrimp, mysis, daphnia, and cyclops are fed straight from the cup once thawed. Thaw in tank water only, never hot…
For herbivorous and grazing cichlids, keep three things off the menu: meaty frozen foods, fatty fare, and predator-menu leftovers, because a long plant-processing gut handles rich animal food badly. Build the staple instead on plant-based pellets and greens, feed modest amounts, and drop any food that is repeatedly…
Color in tetras comes from condition, and condition comes from variety: rotate daphnia, baby brine shrimp, krill, and spirulina-based foods through the week alongside a fine staple, and the reds and blues deepen as the fish thrive. Those foods supply the protein and natural pigments tetras use to build color, while…
Feed tetras one or two modest feedings a day of a fine staple food, with frozen and live foods rotated in across the week, and offer only what the school clears in a minute or two at each sitting. The constant begging is opportunism rather than hunger, because tetras are built to graze on tiny items all day and will…
A balanced goldfish diet uses a sinking staple pellet daily as the base, spinach and blanched peas across the week for grazing and digestion, and frozen bloodworms and daphnia as protein treats a few times a week. Sinking food matters because a goldfish feeding at the surface can gulp air along with floating food,…
In a mature tank, shrimp graze all day on biofilm, algae, and decaying plant matter, and that grazing is the real staple rather than a snack between meals. Dedicated shrimp food is a supplement offered a few times a week, more often for a large colony or a brand-new tank where clean surfaces carry little biofilm.…
Use both routes together: calcium-rich foods to graze on, such as blanched greens, algae wafers, and cuttlebone or other calcium material to graze, and water that does not work against the shell. Soft, acidic water erodes shell faster than food can rebuild it, so keep hardness in a suitable range for the species, and…
Can't find your question? Ask it here. We answer reader questions in KinsLe Answers — and we'll email you when yours is published.
KinsLe is launching soon — and the waitlist hears the date first. Join for launch updates and first access when the app opens.
We email you about the launch. Unsubscribe anytime.