[Vogata]

Attached should be the spectrum on our chosen luminaries at 10 000K. This is the one we felt gave the best result even with limited possibility for broad testing we have some thoughts around it. pdf

Start was a functioning 12 ton winter system and lack of anything resembling summer. The Kichi always wonder so we decided to se if we could turn it around. With old baggage and what little was out there we decided to improve lighting and heating. Heating was easy, thermostat, exchanger and some reading – done.
Light well a different story all together, after a coupler of years with trail and “not so good as expected” we landed on:
10 000K luminary at ~56W and 3680 EM (Lm) per square meter.

As our ability to evaluate Nishikigoi development and knowledge of gen pool for each on is and still are somewhat limited we had to look at different aspects an they where. How did the Nishikigoi react, it was pleasing with better apatite and more activity (almost to much, oops indoors).
Water quality was steady going upwards, life and alga in pond and filter went from almost not existing to thriving and everywhere. Water quality was at current level stabile and pleasing the Nishikigoi are thriving (should really have more space but for us that’s an “always”). It has been pleasing and to the best of our ability good for four years now even if the basement looks like an illegal “farm” from the outside now days. We have seen no downside at this moment.

We have this winter taken it a step further and open indoor II, but just a 7 ton system her with:
10 000K luminary at ~68W and 4470 EM (Lm) per square meter.
As you can see even a bit “lighter”.

Hope that this information can be helpful for some and help the more knowledgeable out on the board to help us make it better.
Please feel free to jump in and trash the system – rebuild area fun.