Thanks so much for the info, kfish! Finally
, Bee went to the bathroom! In order to hopefully avoid any constipation in the future, I bumped him down from six to five pellets a day and am fasting him once a week. (I'll also keep this thread bookmarked; everyone's been so helpful and I'd love to keep all this information on hand!)
Unfortunately, Bee is still freaking me out over his color; I feel that he's definitely starting to pale and that his color is going dull. Also, the white on his abdomen/belly has seemed to intensify and he's starting to turn white/gray in the area under his mouth. I don't know if this is natural or something to be concerned about.
His new tank is 2.5 gallons, currently heated at 75 degrees with a working filter. I made sure to rinse off everything new in hot water before putting it in. I've also been using 1.5 mL of conditioner every time I do a water change; the last change was a 50% on Tuesday.
Here's a picture of the white... Cause for concern, or completely normal?