coraline algae

ok i don't know if this is going to be a stupid question or not but here goes. what is the difference between the dark purple and the light purple coraline algae?
 

javajoe

Member
There is not a lot of difference- coraline algae does come in many colors. from my experience, the darker colors tend to reuire less light... i had LOT of dark dark purple coraline when i was using NO bulbs, and when i upgraded to VHO, all the dark purple only grow in areas that are in the 'shade' now.
 
that's strange bc i have only got 120w of flourescent lighting on my 30G. and the light purple is what seems to be growing more.
 
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