Impressive collection! Well done!
It's amazing how well Dros grow if they're well fed! I use frozen "blood worms", which are some kind of mosquito larvae, which are available in small blister packs in various pet supply stores. I pop out a portion, thaw it out, and pull out a few with my stainless steel needle tweezers and I use a 4X jeweler's loupe, and load up the dews with them. They seem less prone to get contaminated with fungus afterward. In a week or two, the plants make a leap in growth. - Rich