Thank you all for the reactions and compliments.
Ed Reef; Please teach me!
Jar*Head; in a Ca reactor it is more about the volume then the amount of media. The longer the duration in the reactor the higher the alk and dissolvement of CO2. The amount of media is not that important.
I like to have a visual check, so the media will only be in the reactor itself, and not in the vessel

The vessel is for adding volume only.
Ian; They are used as shoplights. I don't know if they use this brand over there in the US. But is you search for shoplight-systems you could find similar lights. You only have to replace the bulbs for 6500 K or 10.000 K bulbs.
I can send you a PM with more info if you like.
I could't resist the pressure

I made some tank pictures. I'm still in a minicycle because of all the new SW, so the back of the tank is bright green

Shall I go for a dark blue or a black background... Wat do you guys think?
FTS from the cornerside
My Acanthurus Coeruleus. I really like this fish
My Threadfin Apogons. The lagoon will be almost an Apogon-only tank. So I'll add MUCH more Apogons in the near future
Leonardo