Start here · Essential guide
How to Treat Ich in Fish
Learn how to recognize and treat ich (white spot disease) in freshwater and marine fish, from heat and salt to medications, plus quarantine tips to prevent it.
Health & Reptiles
Fish Health & Disease
Spotting and treating common fish illnesses.
Fish Bloating Symptoms and Treatment
Learn the signs of bloat and dropsy in aquarium fish, what causes a swollen belly, and the cautious steps to take, from fasting to quarantine and veterinary help.
Fish Injury Treatment
How to care for an injured aquarium fish: assess the wound, isolate and protect the fish, keep water clean, and know realistic healing times and when to seek a vet.
Fish Lice Symptoms and Removal
Recognize fish lice (Argulus), see the symptoms they cause, how they differ from anchor worms and sea lice, and learn careful removal and prevention steps.
Fish With a Red Spot on the Side
A red spot on your fish's side can mean injury, poor water quality, or bacterial infection. Learn how to tell them apart and what steps to take.
How to Kill Algae in a Fish Tank Safely
Get rid of aquarium algae without harming your fish: fix light and nutrients, remove it by hand, use algae eaters and plants, and know which shortcuts to avoid.
Inflamed Gills on Fish
Red, swollen, or pale gills often signal poor water quality, low oxygen, or infection. Learn the causes, immediate steps, and recovery outlook for gill problems.
Pond Fish Fungus Treatment
Cottony growths on koi or goldfish usually follow injury or stress. Learn how to spot fungus, rule out look-alikes, and treat pond fish with care.
Stress Spots on Fish
Spots, stripes, or color changes on fish are often stress-related. Learn how to tell stress marks from ich, find the cause, and help your fish recover.
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