Hi all, fairly new to reefing. Having a battle with phosphate and nitrate at the moment.

Phosphate started at 0.9ppm about 4 months ago. Brought down slowly with a low dose of rowa. Happy enough with this for now until I reach the target range 0.1-0.2.

Nitrates have been flat lined since I started in the hobby and will not budge. Any tips before I start adding nyos nitrate +?

Currently running a skimmer, a refugium with chaeto in, roller filter, rowa and a incline uv steriliser.

Fairly low stocking. 240l display, 70l sump.

Coral- A Duncan, kenya tree, gsp, 2 hammers and a toadstool.

Fish- Clownfish, purple tang, foxface.