I'm starting to get this green algae on my lr I'm testing and everything is good A-0,ph-8.4,no3-0,no2-0, ca-500,alk10. I have a 75 gl up and running for 1yr and a half , 216 w t5. No cuc , i do admit my light has been staying on longer due to the fact I'm working later . I'm upgrading the light...