Nitrate reduction

[PeterEde]

What light on the chaeto

Only a Petworx 9w
Probably not enough. Although it's growing slowly

 

[PeterEde]

Does this look like a tank with a high 50ppm Nitrate problem?
Back glass is covered in algae which for now is not bothering me as it feeds my urchin and there are a couple of tufts algae on the top of my rock.
Sand is clear.

 

[Spare time]

Only a Petworx 9w
Probably not enough. Although it's growing slowly

Get a better light and watch phosphates (dose if they get too low). You will be amazed at how well macro algae can work at lowering nitrate and phosphate