Last week, I noticed severe swelling and redness in my one goldfish Cheddar’s back fins that were reaching all the way to the base of his tails. After speaking with Petco employees, I did a 50% water change and added good bacteria, pH up. I was still very concerned about the pain/ redness, so I spoke to a veterinarian. They recommended warm aquarium salt baths and using Melafix for 7 days. It has been 6 days, and the swelling and redness is almost completely gone. I was skeptical at first based on some mixed reviews saying this could “kill your fish”, but I wouldn’t listen to those unless you feel your fish are too far gone! While my fish seemed to react to the Melafix at first (which has a strong tea tree oil scent), he has been doing great. I couldn’t recommend this product more for curing/ healing tail rot and nitrate redness.

This managed to kill 2 of my fish at separate times. First it was for a pleco who we transferred to a tank by itself after displaying signs of being sick. After being in his own tank for a few days he started to show improvement. Someone at petco suggested I get this to help with any sickness. Not even 12hrs after added it, poor little guy was dead. Fast forward several months later a black widow we had had stopped eating and was staying towards the bottom but started coming around and ate some. Then my fiance suggested we try this to see if it will help her improvement more. 30 minutes after using it, the black widow start thrashing in the tank and ended up dying. This crap is horrible!!!

Great service and very helpful to anyone who is interested in asking for help

I always buy Hills Science and enter my phone # at check out. Last 2 purchases do not appear in app. Always shop there for dog and fish supplies and vital care.

I bought this today for my gold fishs wounds a few hours later came home from grocery shopping all 4 goldfish were dead do not recommend

I spoke to a Petco employee who is considered the local store’s aquatic expert. I described the condition of my ill Betta, and MelaFix was recommended. I said Betta many times. He said Betta many times. I took the product home and treated the tank water as instructed. The fish went into immediate distress. I didn’t know what to do. I thought it might be a healing crisis. A couple of hours later my little pet was dead. I went online and discovered that MelaFix fatally damages the betta’s ability to absorb oxygen. I went back to Petco and told the aquatic ‘expert’ what had happened. He merely said, “Oh, it was a Betta.” So, the product might be great for other fish, but it kills bettas. There should be a warning on the product, since it is sold next to Betta products. Generally speaking, one apparently can’t rely on employees too listen, or to think with the brain god gave them. It would be good if your labeling helps the owners to make an informed choice.

DO NOT BUY FOR GOLDFISH!!it killed all my goldfish before i could even finish the medication.

I have used this as a preventative with new guppies in quarantine. Other than a very strong smell and the millions of bubbles it caused on the water surface (both normal) it had no ill effects on the guppies and none developed any illnesses during or after quarantine.