Thank you very much for the reply @HanumanHere is my assessment.
1. Considering the prominence of the hardscape/wood centrally located all along the tank, I am not convinced that a spray-bar is the best here. Water flow patter is being disrupted.
2. I am concerned those two wave makers/pumps could be a bit excessive.
3. You could slightly increase NO3 but I am not sure that will fix the issue. I think the wood is probably releasing lots of organics and that is not helping.
Overall I would try improving the CO2 and O2 distribution in that tank for long term BGA control and stability. I would also use Chemiclean or similar product because that would alleviate your issue for a good while. It's not good to let cyanobacteria proliferate specially for the inhabitants...and smell, I can't stand it. 😅
I can't answer that definitively, but I would assume that yes. Wood will always decompose anyway but if the wood is young and has never been in a tank or washed in a river for some period of time, I would think it would release more organics than a wood that has aged significantly. A botanist or a biologist would certainly better answer this question. The thing is that because the wood is exposed to light, it is also a magnet to algae in general.With the wood releasing alot of organics, I'm assuming this will this eventually slow?
Although I do have one for the sole purpose of increasing oxygen in the water column I don't think it's necessary. You can achieve similar higher oxygenation in water by increasing surface agitation and making sure that your surface is always clear. Also making sure that the skimmer is slightly pointing down enables you to bring highly oxygenated water to the lower stratum of the tank.I've been considering adding a Chihiros New Doctor/Twinstar alternative to increase oxygen levels though it's another big investment, would this be worthwhile?