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Hi there! Having a few questions: i dont know what is happening, all of our fishes are always dieing. I would like a fish expert answer. What is happening to these blue fishes? On their skin there are multiple grey spots, and another fishes are getting it as well. What antibiotic should I use for it? Second, trout had some kind of tumour (I cut it out to check what kind of tissue is there). And last question: is it safe to give food (small worms) out of the freezer in a cube of ice ? Thanks <3

Hi there! Having a few questions: i dont know what is happening, all of our fishes are always dieing. I would like a fish expert answer. What is happening to these blue fishes? On their skin there are multiple grey spots, and another fishes are getting it as well. What antibiotic should I use for it? Second, trout had some kind of tumour (I cut it out to check what kind of tissue is there). And last question: is it safe to give food (small worms) out of the freezer in a cube of ice ? Thanks <3

Updated On January 15th, 2020

Pet's info: Fish | Algae Eater

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Answered By Angel Alvarado, LVT

Licensed Veterinary Technician

This question includes photos that may contain sensitive content. Click to view.

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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 directions. Remove the carbon filter insert during treatment if indicated. Maintain pristine water quality via filtration and regular partial water changes to aid in recovery. You can feed frozen worms, just thaw then first in a small cup then place them in the tank.

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