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77 results for “dissolved oxygen”
Why Do Goldfish Lose Buoyancy (Swim Bladder)?
Lost buoyancy (swim bladder disorder) is a common goldfish disease many owners meet. Signs include the fish lying on its side or upside down, floating at the surface or sinking to the bottom. This article focuses on the common causes of swim bladder loss in goldfish.
Arowana Care Guide
Arowana have many keepers, but they are delicate and timid, so good care is not easy. Here are some daily management tips that help keep arowana healthy.
Blood Parrot Cichlid Care: Ideal Water Temperature and Husbandry Guide
Blood parrot cichlids are colorful tropical aquarium fish. Keep the water stable at 25–28°C (77–82°F), maintain a slightly acidic pH of 5.5–7.0 with frequent partial water changes, feed a balanced diet of pellets plus occasional disinfected live foods, provide moderate lighting, ensure strong aeration, and watch for common illnesses like saprolegniasis and ich.
How long should a koi rest after jumping out of the tank?
Return a jumped koi to the water at once, check oxygen and add air if low, then rest it in shallow water 3 to 4 days, fasting the first 2 days and feeding high-protein food after. A koi survives out of water only 3 hours; without help in 3 hours it suffocates.
How long does it take for a tiger fish to grow?
Tiger fish grow relatively slowly, taking about a year to grow from 10 cm to 20 cm, and usually reach maturity around 1 to 2 years after birth. They are carnivorous and prefer live prey such as small fish, shrimp and loaches, though they can learn to accept artificial feed. Regular water changes and aquatic plants help keep the water clean and oxygen-rich.
How often can goldfish be fed?
Pet goldfish are best fed 1-2 times daily, twice for juveniles and once for adults. New tanks with unestablished water can be fed every 3-5 days. Adjust timing and amount by season and water quality.
Do Koi Need Light?
Koi need a certain amount of light—natural sunlight outdoors, or 8–10 hours of artificial aquarium lighting indoors. Proper light regulates their biological clock, supports plant growth and vivid color, while too much light fuels algae, so keep intensity moderate.
How to Encourage Koi to Breed?
To get koi to breed, keep the water clean at 18–25°C with ample oxygen, choose healthy same-variety partners at a 1:2 male-to-female ratio, boost nutrition without overfeeding, and provide a quiet, planted tank. Remove the eggs promptly after spawning so parents don't eat them.
Why Is My Goldfish Lying on the Bottom of the Tank in Winter?
A goldfish resting on the tank bottom in winter is usually caused by low water temperature, poor water quality, or illness. Cold water slows the fish's metabolism so it conserves energy at the bottom—raise the temperature to 18–25°C with a heater. Dirty water should be refreshed and kept at pH 6.5–7.5, while disease (enteritis, temperature shock, bacterial infection) needs prompt isolation and a 1% salt bath. Regular water changes and added aeration further prevent the problem.
Can you keep fish in purified water?
Purified water is not suitable for fish because of low oxygen and missing minerals; use tap, well, or river water instead.