Betta Fin question and sticky substance in the tank
As a new fish keeper I experienced a painful learning curve. I got my betta (named Happy) as a gift in a bowl, and I upgraded his home to be a 10 gallon with some plants. I added some ghost shrimps and 5 Harlequin Rasboras 3 weeks ago. Shrimps were keep dying and it appeared to me that Happy was stressed to live with other creatures. 10 days ago I saw white spots on Happy and one of the rasboras, I immediately quarantined all fishes in a small tank for a 3-days ich treatment, but 5 rasboras end of all dead on day 3. The shrimp was quarantined in a separate bowl and now back to the main tank with Happy. Happy's fin has broken edges, what would be the best treatment? Yesterday when I took out the ornament for cleaning and felt a layer of sticky substance, is it algae? I don't notice any visible algae, what shall I do to prevent the algae break out? Thank you for everyone would give me advises. I attach a picture of my Happy.