Yes, very mature. High nutrient load. I was able see a nitrate reduction, but nitrates weren't particularly high in the first place. Routine cleaning did a better job.

I have been vodka dosing for a few months now and I think its great. I admit, I over feed my tank and before I started dosing, I always ran into algae issues due to excess nutrients. Since I started dosing though, the algae has not returned (knock on wood) and everything is growing and doing great.