Help....No Coraline Algae to Speak Of

[beginnersluckpg]

OK here it goes, i cant seem to grow any coraline on the rock and for that matter the coraline that was once on my overflow and glass is pale and not expanding. My water parameters are temp 79, calcium 410, mag 1400 and kh is 7.5 Theres a couple of photos for you to see i apoligize for there quality still learning how to take pics........


Any help would be greatly apreciated..........