Ok. Got the Melafix form my LPS. Now do I follow the instructions on the label? Because I understand that you administer the dose and then add the same dose everyday for 3 days, then do a 25% water change... but shouldn't I do 50% changes everyday instead? FYI, I have a 2.5 gal tank.
I am no expert...you will want to Google more on this. But I just put half a teaspoon in my 2.5 gallon tank everyday for about a week. I did 1/4 water changes every other day... I can say this - you will be surprised at how fast it will start to heal. One of my fish got a hole in it's fin - things got a little out of hand while I was trying to clean the entire aquarium after my son put chocolate milk in it...and I think I caused it to tear myself. A hole - right in the center of his lower fin. Within a day it was closed and healed. It will be okay. Whether you change half or 1/4 it will still work.
Oh one more thing...how did the rip happen? You will want to investigate that. Take out any sharp plastic plants or toys/stuff. I use silk or silk like plants and every now and then one of the fish I think will tear on a plastic edge of a fake plant. You have to watch that. I hear the "pantyhose test" is good - that is if you can run the plant down a pair of pantyhose without it running the nylon, it's safe for your fish. DO try this at home! hahaha!!!
Remember just use a 1/4 teaspoon! There are posts that say it's toxic at higher levels (I didn't know that but I guess it's an ongoing controversy in the betta world...there is also a treatment called Bettafix that is the same but less concentrated...). So make sure you use the 1/4 teaspoon and I'd mix it with a little water from a cupful from your tank before pouring it back in. I knew none of this before your question..I was just putting it in my tank and my fish all healed. Several have had torn fins from time to time for God knows why. But they heal quickly so it will be cool! Good luck!
My fish has tattered fins and he had a big rip in his bottom fin less than a week ago. The big rip is completely healed already. It was almost completely healed before I started any water changes or medication. You can't even tell it was ripped anymore. But just to make sure, I'm using the Bettafix for 7 days.