Switching brands is fine as long as you know what you're switching to. Ammolock for instance detoxifies ammonia but in a war that nitrifying bacteria can't get rid of the ammonia. I've tried AmQuel and AmQuel 2, and found that they have caused pH and water hardness crashes. From my own trials, I prefer Aqueon water conditioner. But most of the posts I read from many experienced hobbyists use Prime. Now for my own question...how did your betta get injured?
Just wondering. My betta has a favorite sleeping spot too so I understand.
I know that medication is fine. I can just think of others that will kill your cycle.
Her injury based on the swelling looks more typical of bruising. If there is anything that looks like infection or fungus later, there are quick dip treatments that you can do with methylene blue or malachite green that won't harm the biological systems in your filter. The dips are quick, then rincing in tank water before putting betta back in tank. Hopefully we don't develop that need, but let us know if things start to look alarming. We can advise. Otherwise, just continue feeding and water changes as usual.
