I could post this elsewhere, but I think the reactor is not a problem. From what I gather, the mechanism of getting CO2 dissolved changes throughout the photo period. For example, early, CO2 goes in just fine, however, at saturation, bubbles form in the reactor. Theses can either stay there (they make some noise), be blown out large bubbles (mine runs ~5* tilt. I can purge gas mid day), or the bubbles can be chopped up and run through again. I am happy with my reactor and am in the process of confirming Tom's observations. Not quite a full fledged idea yet, look for more in the proper post.
Your tank looks great!