Who Gives A Fish Forums

I'd double-check your nitrate levels. Even low nitrates can mess with their breeding behavior. Keep it under 10 ppm. Also, a slight temp bump to 80°F might help. Just don't go overboard.

Yeah, cycling is non-negotiable. And while we're at it, stop using those tiny bowls. A 5-gallon minimum is the way to go. They need space to swim, not just float around like a decoration.

Sand shouldn't be the issue then. Keep us posted on how the treatment goes. If it doesn't clear up in a week, you might need to look into other meds like Metroplex.

White, stringy poop can be a sign of internal parasites. Have you treated the tank with anything lately? I'd recommend PraziPro if you haven't already tried it. Also, how often do you do water changes?