Common Aquarium Problems

Fish not eating can be caused by stress, poor water quality, disease, temperature issues, or new tank syndrome. Check water parameters first.

Fish gasping at the surface usually indicates low oxygen, ammonia/nitrite poisoning, or gill disease. This is an urgent situation.

Fish staying at the bottom can be normal for bottom dwellers, but for other fish it may indicate illness, stress, or poor water quality.

Cloudy water is usually caused by a bacterial bloom, overfeeding, or inadequate filtration. It's usually not immediately dangerous but should be addressed.

Ammonia spikes are dangerous and can kill fish quickly. Immediate water changes are necessary. Common in new tanks or after filter disruption.

White spots are usually Ich (white spot disease), a common parasitic infection. Early treatment is important.

Swimming upside down usually indicates swim bladder disease, which can be caused by overfeeding, constipation, or infection.

Fin rot is a bacterial infection that causes fins to deteriorate. It's usually caused by poor water quality or stress.

Algae growth is normal but excessive algae indicates an imbalance of light, nutrients, or CO2.

Some hiding is normal, but excessive hiding can indicate stress, illness, or bullying from tank mates.

Bettas may hide due to stress, illness, strong filter flow, or simply because they like resting in plants. Some hiding is normal.

Corydoras occasionally swim to the surface to gulp air, which is normal. Frequent surface swimming may indicate low oxygen.

Rapid breathing usually indicates stress, low oxygen, or gill irritation from ammonia/nitrite.

Clamped fins (fins held close to the body) indicate stress, illness, or poor water quality.

New tank syndrome occurs when a tank hasn't been cycled, leading to toxic ammonia and nitrite levels. Fish-in cycling is stressful and risky.