Algae is certainly in no short supply but I guess it depends if it is a type they consume or prefer. I have gotten Megalodoras uranoscopus to surface feed and rather quickly. They swim upside down at the surface. I never thought they would but perhaps it is possible the high fins can too. I wonder if there feeding habits on prepared foods change as they grow larger? Hopefully you will soon find out if your current fish continue to do well.
