is my fish sick

I recently donated all of the juvenile mollies in my tank to the LFS I work at, and now that there’s more room in the tank my mollies have been “doing it” nonstop. Yesterday I noticed that my black molly’s belly was a bit bigger and more squared off, but now I’m concerned. She’s removing herself...

I recently got a betta like a week ago and i always saw him rubbing against rocks and what looked like him peeling his slime coat off. Now he has develoved all of these white spots and i need to diagnose him quickly because i heard that if ich is untreated it can kill your whole tank. I have...

My fish is less than a year old, probably around 3 inches. I feed her exclusively algae tabs because she won’t bother with veggies. Tank has been treated for ick in the past as that’s what I thought it was. She has had these white patches for months(they never went away with treatment) and...