hi guys i got a question i have the regular pink coraline algae would any other lr would have buti seem to have 2 other type s 2 thy look the same but the one is light green and the other black or dark grey do u guys know what it is since i had it the green one has died (gone white) but seems to be ok in the shade of the rock and the black one seems to be getng lighter but the pink coraline seems to be ok any help plz guys