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Related Articles & Questions
- Health & Wellbeing
Freshwater Fish Ich: Stop White Spot! Identify, Treat & Prevent
Freshwater Ich is a protozoan disease that is often called 'white spot disease' and is the most common disease to infect freshwater fish.
Updated on November 13th, 2025
- Health & Wellbeing
High Nitrates in Your Fish Tank? Protect Fish Health & Prevent Deaths
Search Petco to find out the harm of high nitrates in freshwater fish aquariums. We provide vital information to help keep your fish happy & healthy.
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- Health & Wellbeing
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- Health & Wellbeing
My koi are loosing scales and one of my goldfish has white bumps on it's head. What could it be?
This could be bacterial or parasitic infection. It is difficult to determine definitively since the image provided is not clear. Fish can be difficult to photograph. Basic care includes checking water quality and chemistry. This can be done using a home test kit or by submitting a water sample for testing. The local Petco may do this for free or for a small fee. There should be an absence of ammonia and nitrites with nitrates at 20-60 ppm. pH should be as close to 7 as possible, avoiding large swings. Koi can tolerate a wide range in temperature, but generally do best between 65 F and 75 F. Again, avoid large swings in temperature to prevent stress or shock. If necessary, a partial water change can be done to stabilize chemistry and/or improve water quality. If you have other koi, consider placing this one in a hospital tank to make treatment easier and to prevent spread if the condition is infectious. Plain aquarium salt (NOT table or Epsom salt) can be used to reduce stress, impro
Updated on August 12th, 2025
- Health & Wellbeing
So since the last time I asked he started to show signs of fin rot and this morning I saw one thin white filament attached to his left fin. Doesn't appear to be attached to his body anywhere else but his one fin. He is in a 1 gal tank and I put a fun
Maintain pristine water quality regardless of any other treatment. Clean water is the foundation for treatment and recovery. You can use aquarium salt, but no more for 14 days. An anti fungal medication may work *if* the condition is fungal. If it is bacterial, it won't help. You can try an 'all in one' product, such as Lifeguard (by Tetra). Find it in the aquarium section of the local Petco. Follow label directions carefully and remove the carbon filter insert during treatment if indicated.
Updated on August 12th, 2025
- Health & Wellbeing
This red spot is getting worse ive monitored the ph and ammonia is it red patch disease what should i do? Treatments!?
Thanks for reaching out about your fish. Red spot disease is a fungal infection and usually appear fluffy. Adding anti-fungal medication to the tank is not recommended as these can often cause more problems. A veterinary visit is recommended to assess. If you only have goldfish, no live plants, no invertebrates, you can try adding aquariums salt (not table salt) to the tank at 1 Tablespoon per 5 gallons, once daily for 3 consecutive days to slowly raise the salt concentration. Monitor appetite. If fish seem stressed, perform a partial water change. Good luck.
Updated on August 12th, 2025
- Food & Nutrition
My neon tetra have developed a white growth in his mouth to the point that his entire mouth is full & he is unable to take in food. Another neon tetra has developed the growth as will & it is growing in size. The other one is bloated. I have tried a
It could be Columnaris, aka cottonmouth. It looks like a fungal infection but is actually an infection caused by a gram negative bacteria. You can treat with kanamycin and nitrofuran. Both are antibiotics effective against this bacteria. Brand names are Kanaplex (by SeaChem) and Furan 2 (by API). You can find them online or in the aquarium section of the local Petco. Follow label directions carefully and remove the carbon filter insert during treatment if necessary. You will likely need to treat the entire tank since more than one fish is symptomatic.
Updated on August 12th, 2025
- Health & Wellbeing
Hi! Two days ago I adopted an injured blue gourami fish. It was injured 10 days ago. Some of the minor wounds healed before I got it, but one has a fungal infection (like white cotton). I have started to treat that with something called Furamor-p. Th
Physically removing the fungus may cause more stress. Allow the medication to work. Read the package directions carefully and remove the carbon insert from your filter, if necessary, during treatment. Epsom salt can help with fluid retention if that is the cause of the swollen abdomen. Other causes include swim bladder issues, intestinal parasites or constipation. An epsom salt bath would be preferred over treating the entire tank. Dissolve 1 tablespoon of epsom salt in one gallon of tank water. Remove the fish from the main tank and allow it to swim in the salt bath for 15-20 minutes before returning it to the main tank. Do this once daily.
Updated on August 12th, 2025
