Sick Fish part Deux. please help

[demonr6]

I don't know what to do for my poor fishy. Yesterday we found him floating on his side, the pH was whacked out. I immediately moved him out of that tank not knowing what was going on and have him quarantined right now. He is still on his side, trying to swim around and right himself. On occasion he is active but then he gets listless and floats around not moving at all. I have never had this severity of an emergency so I don't know how to proceed. I attached pics, he doesn't seem much different than normal by appearances other than floating on his side.







Housing
What size is your tank? he is quarantined in the container we bough him in
What temperature is your tank? 76
Does your tank have a filter? n/a
Does your tank have an air stone or other type of aeration? n/a
Is your tank heated? y, we rigged it so that the container is in heated water
What tank mates does your betta fish live with? n/a

Food
What type of food do you feed your betta fish? pellets, dried bloodworms but no feeding in a couple of days
How often do you feed your betta fish? daily

Maintenance
How often do you perform a water change? weekly
What percentage of the water do you change when you perform a water change? 25%
What type of additives do you add to the water when you perform a water change? Betta Bowl Plus

Water Parameters:
Have you tested your water? If so, what are the following parameters?

Ammonia: fine
Nitrite: fine
Nitrate: fine
pH: 7.8-8.2
Hardness: fine
Alkalinity: fine

Symptoms and Treatment
How has your betta fish's appearance changed? lighter, pale'ish
How has your betta fish's behavior changed? floating on his side, minimal movement at times
When did you start noticing the symptoms? 2 days now
Have you started treating your fish? If so, how? quarantined, in new water
Does your fish have any history of being ill? no
How old is your fish (approximately)? 1-2 yrs