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Altum Angelfish (Pterophyllum altum)
The altum angelfish (Pterophyllum altum) is found in the Orinoco basin of Venezuela and Colombia. Not very hard to keep, but it needs oxygen-rich, roomy water and must not be frightened. Because it is hard to tame, artificial breeding is difficult and it should not be mixed with small fish.
Lionfish
Lionfish (Pterois), also called turkeyfish, is a popular ornamental marine fish with a distinctive fan-like pectoral fin. Its dorsal-fin spines are venomous—a sting causes severe pain and, in serious cases, fainting.
Angelfish
Angelfish (often called the freshwater angelfish or 'swallow fish') is a tall, disc-shaped cichlid whose graceful, sail-like swimming made it almost synonymous with the tropical aquarium hobby.
How do you change water for goldfish?
Change goldfish water by pre-conditioning new water, matching temperature within 2-3°C, siphoning from the bottom, and replacing 1/3 to 1/4.
What Causes Fish to Become Oxygen-Deprived?
Low dissolved oxygen in the water is the direct cause - from overstocking, aging water, excess plants/algae, high temperature, pollution, or illness. Keep stocking light and refresh water regularly.
How to Prevent White Spot Disease in Koi
Koi white spot disease (ich) is caused by the parasite Ichthyophthirius, which dies in high heat. Prevent it by keeping water warm, maintaining good water quality (stable pH/ammonia, regular partial changes), avoiding overcrowding, quarantining new fish, and monitoring health.
Why Do Koi Get White Spot Disease (Ich)?
Koi 'white fungus' is really white spot disease, caused by the parasite Ichthyophthirius multifiliis. It spreads through poor water, temperature swings, new fish, overcrowding, or stress, and shows as salt-grain spots, rubbing, and lost appetite. Treat by improving water, quarantining, using ich medication, and raising the temperature to 30–32°C for about a week.
Why Is My Silver Arowana Losing Scales?
Scale loss comes from poor water, chasing new fish off its territory, or disease like red-skin or pinecone. Fix the water and isolate, give more space, or medicate - and know recovery takes one to six months.
How to Prevent Arowana Fright
Arowana fright is common and hard to eliminate entirely, so owners should both prevent it and know how to respond. Give new fish quiet time to adapt, keep tankmate sizes matched, maintain stable warm water, and limit pets/children near the tank; for an already-startled fish, the 'old three' (heat, salt, water change) usually helps.
What Causes an Arowana to Lie on the Tank Bottom?
Arowana are very sensitive to environment and water changes; noise or big changes inside or outside the tank can cause lying low, as can big water changes or large pH or temperature swings. Our veterinarian details the causes.