Sick Betta Emergency

hey
my betta won't eat, and will just lie aroud the bottom of his tank. i feed him pellets (hikari betta bio gold) he won't even eat bloodworms. hell bite the pellet then spit it out. he used to constanlty get his head stuck in litle places so i bought new gravel. he looks like he has little spots of scales missing and little i dont know cuts but they are not red. earlier today i notices he has like a black dot on his back fin. he looks like he has fin rot. he wont even open up his fins anymore. they are all scraggly and such. what should i do. i don't know what medicine to get him. i wanted to try the pea but he won't eat. what do i do? i need a reply IMEDIATELY. no is the onlly time i can go to the pet store. no water stats sorry.
here is him b4:


now:

his fins were soo beautiful, now just scraggles. he never opens his fins up anymore. i dont want him to die. Please any help
the whole story:
he went from all active to less and less. then the fins got scraggly and clamped. then he wouldnt eat.

feed bloodworms every sunday, hikari betta bio gold every other day
1.5 gallon
change water every 2 to 3 weeks and he was fine up until now
remove all gravel, wash with only water same temp
im not sure if i can get larger.
i dont have a heater, im in south florida (its hot enough down here

UPDATE:
just bought melafix and added to tank.
added 1/2 teaspoon of aquarium salt.
just did before melafix 25% water change

posted already in bettas, told me to post it here

have i left anything out that nayone can use?

Any help grately appreciated,
Fisharecool

Hi - those clamped fins and lethargic behaviour are usually a sign of bacterial infection - can be caused by bad water conditions or even being highly stressed over something (the stress lowers their immune system making them susceptible to infection).

You will probably need an anti-bacterial medication, rather than the melafix. Melafix is ok for helping to repair torn or damaged fins - but it won't get rid of a bacterial problem. That needs sorting before his damaged fins otherwise he could die. I've heard aquarium salts are good but don't have any experience of using them and I'm not sure if they act as quickly and effectively as anti-bac meds.

Your LFS should be able to recommend something that is suitable for your Betta if you explain the symptoms.

Poor little betta - hope you manage to cure him.

Regards - Athena