Just a couple thoughts from someone who know nothing about oxygen concentrators...

Oxygen is explosive in purer forms, be careful to not introduce O2 into a system that could spark. Does the concentrator produce pure enough O2 to burn? IDK.

And, I think you would get better O2 transfer if the concentrated oxygen was NOT mixed with your aeration air but yet delivered to the lake water in the same diffused fashion, maybe in close proximity to the regular air aerator diffuses. My train of thought here is that purer O2 will "want" to be absorbed faster than an air/O2 mix and the O2 bubble to water interface would not be hindered by non-O2 element.

Just my 2 cents and maybe not worth that, but I look forward to the discussion.


Fish on!,
Noel