Hi, semi new to the hobby. I have been running a filterless tank for 4 months now and have had no real problems. I have taken a very low-stress approach, giving my tank time to settle and addressing problems organically. While my GSP’s have begun growing and flourishing, my zoas have been overtaken by first bubble algae and now something similar but different. Would very much appreciate knowing what these clear bubble growths are and how to deal with them.