Two Betta's, I'll answer the sticky for both. Most should be mutual answers, but when it comes to specifics I'll specify. Richtofen seems to have more time, Callisto though...
Housing
What size is your tank? Both have a 2 gallon Kritter Keeper {each}
What temperature is your tank? 78*
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? Frozen Brine Shrimp, usually
How often do you feed your betta fish? 2x a day, morning and then night
Maintenance
How often do you perform a water change? Every other day
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? Stress coat, water conditioner
Water Parameters:
Have you tested your water? N/A
Symptoms and Treatment
How has your betta fish's appearance changed?
Callisto is basically the same color, but seems to have lost the control over swimming; just floats around. The underside of his head and gills turned a silver color. He's floating upside down and his gills are moving rapidly, like he's gasping. Clamped.
Richtofen is clamped, a bit paler, a bit bloated
How has your betta fish's behavior changed?
Neither have had appetite issues lately...
Callisto; floating rather than swimming...he's been pretty active up until the point, and I can tell he's trying to swim still but he doesn't seem to be able to. :/
Richtofen; motionless, floats towards the surface and doesn't swim unless stimulated.
When did you start noticing the symptoms?
Callisto; he seemed to have some minor buoyancy issues yesterday, I did his water change and added a small dose of epsom salt. Obviously it didn't help D:
Richtofen; started being more lethargic yesterday morning. Did a water change, thought that might help, no difference in appearance til this morning.
Have you started treating your fish? If so, how?
Callisto; added a small {approx. tspn} amount of epsom salt. Did a water change.
Richtofen; Did a water change, no special additives
Does your fish have any history of being ill?
Callisto; when I bought him he was a little ill, seemed like something with sb, but he got better with treatment and it was so minor I thought nothing of it. Figured it was from icky petstore water.
Richtofen; brand new, maybe have had him three days. Has been fine until now though...
How old is your fish (approximately)? Not sure, in either case. Had Callisto about a month myself, and Richtofen maybe three days.
I'm not sure what's wrong with either of them, immediate help would be appreciated, please! I have to save them! Richtofen has more time than Callisto, Callisto's counting seconds :'(