scrape or no scrape?

[Bous]

I just moved my 125 gallon tank. I didn't scrape the corilline algea off the back when the tank was runnig. Now that the tank is back up and running i was wondering if i should scrape off the corilline aglea or not. i appears to be dead.

[joeychitwood]

If dead, the old coralline consists mainly of calcium deposits. Unless you really like the look of the old coralline, I'd scrape it and either let it grow back or periodically scrape and clean the glass. It depends on your personal preference.