Friend's betta, and a HM that became a plakat...

Hi all,

I wanted to ask you about my friend's betta (that I'm watching for the summer) and my own.

first hers:
He's an HM thats been showing signs of swim bladder disease, so we put him on ES for a week to see if he'd get better. That was about 3 weeks ago, and he's improved a little, but not much. He's still laying on his side and hanging around at the bottom of the tank. I've lowered his water so that he can breathe easier.
Just now, i did a water change, and i noticed that once i put his heater back in the tank, it gives off something thats bluish in the water. Im not sure if it has to do with the heater or just something else in the water, but I've taken out that heater and put in a newer one. Here's his info:

Housing
What size is your tank? 2 gal
What temperature is your tank? ~78 degrees
Does your tank have a filter? no
Does your tank have an air stone or other type of aeration? no
Is your tank heated? yes
What tank mates does your betta fish live with? none

Food
What type of food do you feed your betta fish? Aqueon Betta Food
How often do you feed your betta fish? 3 pellets 1-2x a day

Maintenance
How often do you perform a water change? 1-2 times a week
What percentage of the water do you change when you perform a water change? 100%
What type of additives do you add to the water when you perform a water change? Water Conditioner

Symptoms and Treatment
How has your betta fish's appearance changed? He's a bit bloated, but otherwise the same
How has your betta fish's behavior changed? not as active, sits at the bottom and breathes heavily.
When did you start noticing the symptoms? 3-4 weeks ago
Have you started treating your fish? If so, how? 1 week of ES treatment
Does your fish have any history of being ill? none
How old is your fish (approximately)? ~ 2 years

Then theres my HM, who had tail rot. I've been trying to cure it, but its been nasty, and his tail is now the size of a PKs. Im not sure if hes been biting it, but hes been acting normally and the rots seemed to have stopped even though the tail has a bit of a darker outline. I've never seen parts of his tail in the tank so i assumed hes been biting it.
Aanyways, I had an earlier post on here about him, and I gave him a 5 day treatment with Maracyn. I really dont think it did much then just stress him out. Here's his info:

Housing
What size is your tank? 1-1.5 not sure
What temperature is your tank? 72
Does your tank have a filter? no
Does your tank have an air stone or other type of aeration? no
Is your tank heated? no
What tank mates does your betta fish live with? none

Food
What type of food do you feed your betta fish? Aqueon Betta food
How often do you feed your betta fish? 3 pellets 1-2 times a day

Maintenance
How often do you perform a water change? 2x a week
What percentage of the water do you change when you perform a water change? 100%
What type of additives do you add to the water when you perform a water change? Water conditioner

Symptoms and Treatment
How has your betta fish's appearance changed? his tail is tiny
How has your betta fish's behavior changed? no change, still pretty active
When did you start noticing the symptoms? 2 months ago
Have you started treating your fish? If so, how? with AS, then with Maracyn
Does your fish have any history of being ill? nope
How old is your fish (approximately)? ~1

I can provide pictures if its easier for you all, just let me know please.