Did the new cichlid bring in disease despite quarantine?

Hi, I urgently need help from experienced aquarists. After moving into a house with a warm-water aquarium that wasn't particularly well-maintained seven years ago, I took over the aquarium. We only had huge cold-water aquariums and a pond at home. That's a different story, but to date, there hasn't been a single problem. I had…

Prevent ascites?

Have a nice day ☀️ I have been the owner of a beautiful betta fish for almost 2 weeks now & the little one has grown incredibly close to my heart since day 1😍 Accordingly, I try to do everything right when it comes to his care and maintenance. Especially since I'm still a beginner…