Need advice on cleaning coralline on a used tank.

[trinimaddness]

I sprayed the overflow box with vinegar and tried to scrape it off. Some came off but not all. Its hard to do it that way because the overflow is round so the vinegar didn't really soak in as i would have liked it to. I ended up filling the tank and adding water and vinegar to let it soak. It was a 75 gal tank that i turned into a freshwater.

 

[chiromanta]

Just did it. Two hours with vinegar and blade. Lol.
I did it because I really want to have a clean look of the tank.
To me coraline shour only grow on the rocks.
Thanks everybody for input.
Need a good solution how to get rid of water marks. Vinegar and blade don't do a job.

 

[salpet]

use a green scrub sponge

 

[salpet]

and by the way it will regrow on the glass