A few days ago i noticed my cardinal fish was developing a sore like deal on his bottom lip i have no idea what it is pictures are below. please suggest or inform. Thanks in advance
He might be getting cotton mouth on his bottom lip, it looks more like he ran into the glass really hard and started soring up, it happened once to my Puffer.
I had a good 10" Queen Angel that had the same problem but it was more on the inside of the lip. It was blistered red like us humans accidently bite our lip.
It doesnt look like a case your fish would die from it, I wouldnt worry too much.
It looks like an abrasion to me as well. At first I thought Yea! babies but, alas not this time. It should heal on it's own but, do keep an eye open for infections etc.
Well, I'd move him to q.t. and start out by giving him a f.w. dip and some garlic soaked food. Repeat the dip once per day for 3 or 4 days let us know if it's looking better etc. I always go from least invasive to most.
hth
max