API GOLDFISH PROTECT Aquarium Water Conditioner 4-Ounce Bottle

We've had issues with our goldfish dying off of disease with either new goldfish or newly introduced goldfish. We've been using this with our latest batch of goldfish and they've stayed alive and healthy longer than any other fish we've had.It works great and we'll continue to use it forever, highly recommend!

Been using this for years to maintain my tanks and it keeps my parameters perfectly in check.

Exactly what I needed. My sisters gold fish was turning black and after 12 hours with the liquid in the fish tank he looked so much better and went to his normal color

Great price and a little goes a long ways. Keeps our goldfish alive and healthy. I use every time we change our tank water.

Works well, but I wish it came in a larger size. I have a 20 gallon that it works well in. The last one I bought had a cracked cap so I had to recycle one from another bottle to make sure the liquid didn't evaporate after I opened the seal.

It was a duplicate gift .

I don’t know the specifics I’m just a guy with goldfish that doesn’t want them to die from sink water. With that aside I guess this works. Again I don’t know the specifics but my fish are healthy and haven’t shown any signs of sickness. I don’t know what else to add maybe watch out for the amount you use. I use a literal drop or 2 in a normal sized fish bowl based on YouTube reviews. That works so I’ll keep doing it. Hope I helped anyone

I bought this for a smaller pond that we have and it is easy to use. I have a small pump in it to act like a little water fountain and it moved and sent water out of the pond. It was easy to use this product to replace the small amount of water that was lost.