Hi All, was doing a water change last night and noticed these spider / star creatures on the glass. Sorry tried to get as best pics as I could, but there were a lot. Hydroids or something worse? Let me know your thoughts and if I need to treat. In regards to corals in the tank I have 3 scolys, 2 torches, 2 hammers and 2 blastos (its a newer build so started off slow)
Thanks.