I cannot seem to get this algae issue under control. Any advice would be greatly appreciated. The tank has been running for about a year now. I do water 20 gallon water changes every 2 weeks. Below is the tank information.
125 gallon
30 gallon sump
2 filter socks
GFO in reactor
Skimmer
Auto top off
11 small fish
6 different frags
3 Radion lights at 45%
Parameters
Alk - 9
Ammonia - 0
Calcium- 500
Mag - 1400
Nitrate - 2
Nitrite 0.05
Ph - 8.1 to 8.3
Phosphate- .03
Salinity - 1.026
Silica - 0.03
125 gallon
30 gallon sump
2 filter socks
GFO in reactor
Skimmer
Auto top off
11 small fish
6 different frags
3 Radion lights at 45%
Parameters
Alk - 9
Ammonia - 0
Calcium- 500
Mag - 1400
Nitrate - 2
Nitrite 0.05
Ph - 8.1 to 8.3
Phosphate- .03
Salinity - 1.026
Silica - 0.03