Phosphate ULR reading .90 - how should I lower?

[Pistondog]

run two Kessil a500x’s in the evening for 3 hours since I don’t have corals, during the day natural sunlight shines into the tank due to being located near a window. Nitrates have been a steady 5.0-10.

Thought this was you

 

[old_lady_4am]

Thought this was you

It was until I got corals. I keep my curtains closed now (except on the weekends when I’m off work). The only light the tank gets is from my tank lights.

 

[old_lady_4am]

Readings this morning are phosphate 0.12, nitrate 10.9. Should I continue to dose both until they come down or only phosphate e?

 

[3429810]

The algae is likely growing due to the sunlight hitt8ng your tank

And if you dig a little deeper that is caused by a nutrient issue which is what everyone here is already discussing. People have natural sun hit their tanks all the time with no issues. Once OP sort out nutrients the algae will follow if dealt with properly.

 

[old_lady_4am]

And if you dig a little deeper that is caused by a nutrient issue which is what everyone here is already discussing. People have natural sun hit their tanks all the time with no issues. Once OP sort out nutrients the algae will follow if dealt with properly.

I feed one cube in the morning and one at night. Should I cut back to once per day until the gha is gone?

 

[old_lady_4am]

I did not dose today. Phosphate went down to .09 from .12 and nitrate went down to 9.8 from 10.9. If they’re up tomorrow morning I’ll dose.

 

[92Miata]

I feed one cube in the morning and one at night. Should I cut back to once per day until the gha is gone?

Reducing feeding very rarely helps a reef tank. Everything you want in the tank needs food. Increase export, don't decrease import.