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 14 of 15
Offer algae wafers several times a week, plus blanched zucchini, cucumber, sweet potato, and shelled peas, weighted down or clipped where the pleco feeds and removed before they foul the water. Tank algae alone rarely covers what it needs, so treat grazing surfaces as part of the diet too, with driftwood and…
Drop sinking wafers or pellets in the same spots nightly after lights-out, when bottom dwellers are active and day fish have stopped competing. Keep the night portion replacing part of the daytime feed rather than adding to it, so the total food stays the same for the whole tank across day and night. Use only a modest…
Feed a growing angelfish two or three modest protein-rich feedings a day, each gone within a couple of minutes, with frozen foods in rotation alongside a staple food. Offer only what it finishes cleanly, spread the food so it is not outcompeted, and siphon up whatever escapes, because uneaten food left sitting is what…
In a planted tank rich in growth, shrimp feed themselves: biofilm, algae, and decaying plant matter are the staple, coating leaves, wood, and glass where they graze through the day. Dedicated food is only a small supplement, offered a few times a week for a modest colony, since shrimp that can graze freely need little…
Deliver sinking food straight to the bottom: send wafers or pellets down a tube, or place them beside the corydoras's resting area, so its meal lands within reach before the mid-water fish notice anything falling. Save part of the ration for after lights-out, when it feeds most actively, and check its belly weekly,…
Give him the first morsel in his own corner so he settles there, or lift him briefly into a floating container in the same tank while the other fish eat, then let him back out once their share is gone. Scatter the community food widely across the surface so slower fish can feed away from him, and watch his waistline…
Size every bite for the smallest mouth in the tank: crush flakes fine, break pellets down, and soak the dry portion briefly in a little tank water so it softens and finishes swelling in the cup rather than inside a tetra or a young guppy. Feed the softened food in small pinches, waiting until one pinch is eaten before…
For the gel food, blend blanched vegetables with a staple food and a plain binder — gelatin or agar — using about equal parts vegetable mixture and staple, pour it into a shallow tray, set it in the refrigerator, then cut it into small grazing pieces and use them within a few days. Alongside the gel, offer blanched…
Feed in two or three places at the same moment so no single bold cichlid can guard the whole meal, and spread food through the water column by mixing sizes and sinking rates, with slower pieces drifting down to shy fish waiting below. Slip food directly to a shy fish's cave with a turkey baster while the bold fish are…
Read the sufficiency signs on the fish and on the wood: a rounded belly, plenty of long waste, and rasp marks on driftwood show a pleco eating the plant matter and fiber it needs. The deficit signs point the other way: a sunken belly and desperate daytime rasping. Offer plant matter as food, such as blanched…
Judge portions by two signals together: water temperature sets how fast koi can digest a meal, and the fish's feeding response shows whether the last portion suited them. As general guidance, in warm water at about 70°F or above offer several modest meals through the day, between about 50°F and 70°F give smaller and…
Offer calcium through two routes at once: calcium-rich food to graze on, such as blanched greens, algae wafers, and a piece of cuttlebone or other plain calcium material left in the tank, and water that does not work against the shell, since soft, acidic water erodes shell faster than food can rebuild it. New growth…
Feed in layers: offer adult-sized food at the surface for the grown guppies first, then add powdered or finely crushed food and tiny items that drift down into the plant cover where the fry shelter. Two or three small meals a day suit a mixed-age tank far better than one large one, because fry eat little and often and…
Treat every feed as a roll call: note who comes up eagerly, who hangs back, and who is missing entirely, because feeding is the one moment every fish should show itself. While they eat, scan fins, eyes, body condition, and breathing, all far easier to judge on fish gathered and active than on fish resting in cover.…
Ignore the begging, because hungry-looking goldfish prove nothing, and read the evidence instead: food still left after about two minutes, pellets softening untouched on the substrate, and long trails of waste behind fish that ate beyond need. The tank confirms it with faster algae growth, a filter clogging sooner…
Fish usually spit food out because the piece is too large or too hard to swallow, the taste or texture puts them off, or they have already eaten enough and are mouthing a pellet they do not need. Dry pellets soften slowly, so a fish may take one, spit it out, and return once it has softened, while stale food is often…
Goldfish can enjoy deshelled peas, zucchini, spinach, romaine lettuce, cucumber and small broccoli florets as a supplement to their staple food. Blanch or steam each vegetable until soft, let it cool fully, remove any pea skins, and chop everything into pieces smaller than the fish's mouth. Offer only a small amount…
Fry eat food matched to their mouth size, in stages. Newly free-swimming fry start on microscopic food such as infusoria or green water, move up to baby brine shrimp and microworms once they can chase them, and then graduate to finely crushed flake or powdered fry food. Feed tiny amounts several times a day, because…
For adult community tropical fish, feed only as much as the whole tank can eat within two minutes, and feed that amount once or twice a day. Judge the portion by the fish, not by the tub: offer a small pinch or a few pellets, watch it all disappear, and only then consider a second tiny offer within the same two…
Build the week around a quality betta pellet as the staple, then rotate protein foods on set days and keep one fasting day. One simple pattern is pellets on Monday, Wednesday, and Friday, frozen bloodworms on Tuesday, daphnia on Thursday, brine shrimp on Saturday, and no food on Sunday, giving six feeding days and one…
Yes, in a small way: ornamental shrimp graze all day on algae and the invisible biofilm coating plants and decor, but a stocked tank rarely grows enough of either to feed a whole colony on its own. Add a shrimp-specific pellet or wafer as the staple, blanched vegetables for variety, and a source of calcium so new…
Yes. A healthy adult fish in a cycled, filtered tank can go a two- or three-day weekend without food quite safely, because the real danger over a short absence is dirty water, not an empty stomach. Fry, very young fish, and small or delicate species have almost no reserves, though, and they need a tested automatic…
The best staple for goldfish is a food made specifically for them: sinking pellets or a gel food formulated for goldfish, sized to the fish's mouth. Sinking food suits how goldfish forage and reduces the gulping of air at the surface that floating flakes encourage, which matters for round-bodied fancy goldfish.…
Match the plan to the length of the trip. For a long weekend, most healthy adult fish cope better with no food than with a stranger overfeeding them, but for anything longer use a tested automatic feeder or a sitter feeding pre-portioned daily pots you have measured out. Avoid dissolving holiday blocks, which can foul…
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