Can Hydrogen peroxide be used as a fungicide for fish egg fungus? If so in what ratio?

Question

I raise tropical fish and have heard about using Hydrogen peroxide to keep fungus from attacking unhatched eggs. For years I've been using Methylene Blue with mixed results.

Answer 1

Better to avoid it. Without knowing the details of your water chemistry almost to the minute, it can either be deadly to the eggs or totally ineffective. Further, it will break down in the tank so quickly that it would only have a antifungual effect for minutes at best.

I would suggest a slightly stringer ration of Methlene blue or swaping to something like maroxy.

Depending on the tpye of fish you are breeding, salt can also be a very effective fungicide for the eggs. For various common fungi, salt at about 0.5% (1 tablespoon per 2 gallons) is very effecting. Do some research on your specific fish first though.

MM

Answer 2

Hydrogen Peroxide Fungicide

Answer 3

Hydrogen peroxide is used sometimes to revive fish that have been in bags at auctions too long and are gasping for air. One drop in a bag is enough to bring the O2 levels up to breathable for them. You are warned not to put in 2 drops because it can burn their gills and cause great distress up to and including death. I would not try it for a fungicide.

I have had fish breeders tell me that methylene blue is the best way to keep fungus off eggs. They say that you can put in a lot and it will not harm the eggs. One even told me that she uses enough so it is hard to see the eggs because the water is so blue. So, I think increasing the amount of "blue" will be the key to success.

Good luck!