Honestly it seems like inevitably if its not algae its coraline that wants to grow in my system and algae wont grow on the coraline. So if I have to pick a poison its coraline all day. Thats my reasoning behind it lol. Ill definetely keep it off my glass. If im tiled on floor it will be nicer to look at than the white. Idk about glass bottom tho if the glass was clean I'd have to see how it looks I may like that with a blacked out bottom.@LRT rereading that to absorb the knowledge and I got a question.
Why do you care about Coraline being able to gain a good foothold??
I don't want Coraline to grow on my glass or the bottom of my tank or my racks. I like those to be clean.