Every month brings a new algae. I've been battling hair algae for the past month or two. Now I've got a combination of green/brown hair and diatoms. I know there's still detritus in the sandbed. I doubled my snails but they can't do everything. Putting my hands in the tank seems to just upset my corals. Oh yeah... Hello! I need advice on my next steps. 20g with a AC50. Can't add a sump. So I'm considering an additional AC30/50/70 converted as an HOB fuge, or getting an algae scrubber, or a nano skimmer. I've read bad reviews about nano skimmers. Leaning toward the HOB fuge as a way to grow macro and pods but I don't know what size to get, and could I run one without worrying about pH.