Algea, whats it from ??

Heres another Q: about algea. First I brown algea. Its all gone, and now a new one came in. Its kind of thicker and a brownish green. I will post some pictures in about an hour or but was wondering if any one knew. This is whats currently in my tank:

16 Gallon
1x96W Coralife Aqualight CF hood w/ Quad 50/50 -Square Pin+
35lbs of LR
1.5lbs of LS
4 Green Chromi
2 Clowns
1 Damsel
1 Banded Shrimp
3 Blue Legg Hermit Crabs
3 Bumble Bee snails
1 Scooter (the colorful one, starts with an "M")
3 Pink tip Anenomes
1 Purple Anenome
Xenia
1 polyp (Still hasn't opened after 5 days)
Purple and Green Shrooms

7:00am- 7:30pm lights go one for morning feeding
Feed them forzen brine shrimp

10:30am-10:30pm
One small feeding before the lights go out.

I add a tablespoon of Kents Coral-Accel each morning along with PH buffer. Every other day I add a small amount of Kents liwuid calcium. I add about 3/4-1 gallons of tap water with drops each day for evaporation. I do water changes each week.

Nitrate 0
Nitrite 0
PH 8.4
Amonia 0
temp 80

Its been up for about 2 months today. .. anyone know whats causing the algea ? I was thinking about getting some more crabs. Would that help.

Pictures soon to come....

-Paul