The red may be cyano
, the brown may be diatoms. I see your phosphates are a bit high so some additional water changes may help there.
What are you feeding? Frozen food should be rinsed in RODI
to remove the water it was shipped in which may contain phosphates.
Also, algae in the tank will consume the nitrate and phosphate so our tests show lower numbers than actual if there was no algae.
I'm having a small problem in my tank that just started. The last time I had a cyano
, or other algae problem was 4 years ago.
Sometimes we need to go back to the basics of algae control to keep things in check.