I agree to an extent rook, unless the tapwater contains 1+ppm of PO4, which is not unheard of. In this case, something like phosban or purigen might mitigate that. You know me, I rarely recommend a chemical solution that can be handled with proper maintenance. I just am not leaning towards over feeding or tank maintenance as the issue since the water parameters look well within what I would call good. Overfeeding would definitely cause PO4, but it would also manifest in the nitrate reading I think.
If the tapwater is clean, then overfeeding and tank maintenance could be the issue...
I think the first step is a black out though, as it will kill photosynthetic algae, and at least get you back to a starting point.
If the tapwater is clean, then overfeeding and tank maintenance could be the issue...
I think the first step is a black out though, as it will kill photosynthetic algae, and at least get you back to a starting point.