This is an uplift design & I imagine it would be successful in your tank. I saw his original (the blue plastic one) & it's nice to see that he has published an updated approach. The best part about DIY is you can follow step by step & get something started quickly then refactor & adjust over time to something that is better suited to your changing environment. It would be easy on your tank to try something like this & it will add air to the water (more on that below).
While I don't have experience working with AIO, if you have the space & are willing to build, a remote refugium would be great. I just looked at your build thread (nice job btw), & you might be able to use a HOB refugium or perhaps you could install a shelf over the top. A refugium is nothing more than 5 - 10gallons, low flow & a plant light that runs off-cycle from your main tank. You could put a 5gallon bucket in a cabinet overhead with a primary & emergency drain if you are concerned about it clogging. I would avoid attempting to put one on the floor next to the tank w/o using gravity as the drain (& the DIY King's over-the-top syphon overflow doesn't work over the long term...I've tried.).
With your current tank, I would imagine you are having pH swings (measure in the morning & after the light cycle at night to confirm). The uplift design will help with that but you might also consider a gravity kalk drip that runs overnight for your topoff water. That will also help keep pH stable.
This is the video I came across.
I would have the space on the wall above the tank for a 2.5 or 5 gallon tank. I think the 10 gallon might be a bit on the large side, but I would have to measure. With the gravity fed drain I guess if the water line isn't too high you wouldn't worry about overflow of the main tank during a power outage, but what if the drain becomes blocked? Rubbermaind under the tank on the shelf to collect water in case of overflow?
Right now that is the one I am leaning towards since I could have the algae scrubber and the refugium in the same tank.
Ya there is quite a bit of ph swing. So this would help with that too!