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Some fish species generally do well in smaller aquariums, are more adapted to aquarium life, & can be slightly more forgiving with water quality fluctuations.
Updated on November 13th, 2025
Learn how to care for large marine fish, recommended diet and habitat setup. Find the right food, supplies and equipment at your neighborhood Petco.
Updated on November 13th, 2025
You may not take your betta fish for a walk, but this aquatic pet still needs daily activity. Petco shares how to encourage daily exercise and play into your betta fish's life.
Updated on November 13th, 2025
Habitattitiude™ commits to environmental protection by not releasing unwanted fish into public areas.
Updated on November 13th, 2025
Learn more about fish anatomy and how they look like when they are at their best. That way, you’ll be able to spot a sick fish and get treatment fast.
Updated on November 13th, 2025
Hello, and thanks for your question. You are right that it’s important not to over feed goldfish, but a single feeding of an extra pinch of flakes shouldn’t be too concerning. If there are still flakes floating around in the tank, see if you can scoop them out with a fish net. Otherwise, I would skip their next feeding and restart with their smaller meal the next time they’re due to be fed. Hope this helps!
Updated on August 12th, 2025
Pimafix is an acceptable "natural" antifungal treatment. Melafix is for bacterial infections. Kanamycin, erythromycin or metronidazole are good broad spectrum antibiotics. Fungus Cure (by API) is an excellent antifungal. You can find these medications in the aquarium section of most pet stores or even online. Follow label directions carefully and remove the carbon filter insert during treatment if indicated. The cornerstone of any treatment is to first maintain pristine water quality and stable chemistry.
Updated on August 12th, 2025
Check the water chemistry. The discoloration could be due to elevated ammonia levels which can cause "burns". Use a home test kit or submit a water sample for testing. The local Petco may do this for free or for a small fee. Aim for an absence (0 ppm) of ammonia and nitrites with nitrates at 20ppm or less. Perform partial water changes to stabilize chemistry and/or to improve water quality. Use only conditioned water that is temperature matched to prevent stress or shock. The Neons (blue fish) appear to be infected with Ich, a parasite. Treatment is possible with commercial products found in the local Petco. Follow label directions carefully. You will need to treat the entire tank until all traces are gone. Removing a lump from your fish on your own is never recommended. You can cause severe injury. Most broad spectrum antibiotics (Kanaplex, Maracyn, Maracyn 2, etc.) found in the aquarium section of the local Petco should help treat or prevent infection. Choose one and follow label d
Updated on August 12th, 2025
Unfortunately the signs you are describing are quite generic and may be related to a long list of different possible diseases. What you have done so far are the right steps to determine and rule out water quality problems, bacterial infections, and I guess you tried already with different type of food. A pic of your Fred could help to determine if there is any other type of disease of him (swollen abdomen? anything on his skin or fins? any protrusion of the eyes? etc etc). If Fred is completely normal, you can try to add some small quantities of aquarium salt to the tank. Please do not hesitate to contact us again on the forum or by requesting a consultation if you have any more questions or to discuss it any further.
Updated on August 12th, 2025
This could be swim bladder disease. It can be caused by infection or constipation You can try fasting Stella for 3 days. Resume feeding bits of cooked and shelled green peas until swimming and defecation are normal. Maintain pristine water quality via filtration and regular partial water changes. Use only conditioned water that is temperature matched to prevent stress or shock. Goldfish are cold water fish and do best between 65 F and 72 F. If fasting and green peas do not work, you can find a broad spectrum antibiotic in the aquarium section of the local Petco. Follow label directions carefully and remove the carbon filter insert during treatment if indicated. A broad spectrum dewormer can be used concurrently, if necessary, in case the condition is due to parasites.
Updated on August 12th, 2025