End of the first week. Got growth of brown layer algae on the submerged portions of the mesh. green hair algae starting to grow at the top of the mesh.
Took out the mesh and roughened it up with a hole saw attachment as described.
NO3 and PO4 are undetectable in my system despite not having changed water for 1 week (I previously used to change water daily). Algae growth in the DT seems to have slowed down tremendously and the colony of Xenia I have, that was previously flourishing, is now almost completely faded away. SPS extensions are longer, and colours are improving. Even the blue zoas I have are colouring up better than before.
I know from past experience that my NO3 and PO4 will spike after 5 days of no water change, and I would have to harvest algae from my rocks every 3-4 days. So the fact that my parameters are good, and that I haven't had to pull off any algae, is to me, testament to the fact that something in my system is working well!