Originally Posted by BettaRed
I guess I'm going to kill him since theres 100 views but no real replies... he's in really bad condition!
There's a reason for that. A lot of people haven't seen a betta in that horrible of a condition and a lot of people don't want to give you wrong advice. We're all trying to help you here, just change the water. Take out all of the plants and anything sharp, but put a mug in there or something so he can hide.
Do a 100% water change with water conditioner..make sure its the same temperature and when you add the water it's already treated before you put your fish in it. Make sure your conditioner takes out heavy metals as well. Do not use any Ph down or up or any other additives at this point. I do recommend the stuff I use, Kordon Fish Protect to relieve some stress.
I'm not sure if it's a good recommendation, but I wouldn't put any salt in there for now until OFL can get in here. Send OldFishLady a PM. Just make sure his water is at a comfortable temperature (76-80ºF) and keep his tank dark and out of the light. Wrap a towel around it if you need to so he can relax.
EDIT: Can you please link us the site you got the information to put sea salt into his tank? I kind of want to read their "information".