melev

Last year, I posted about the upgrade from single ended metal halides to TwinArc bulbs. I used the same reflectors and ballasts, but could now have 20,000K lighting for a few hours and 10,000K lighting for a few hours, daily. The best of both worlds, right? http://www.reefaddicts.com/entry.php...l-halide-bulbs

10 months later, I knew it was getting close to the time I needed to get new bulbs, and I was really debating what to go with: upgrade to all 400w bulbs ...

The metal halide bulbs are key to growing corals in my reef. Day after day, the bulbs light up the display and the corals grow. Over time, the bulbs weaken and even shift spectrums, which can result in unpleasant pinks or yellows that make the corals appear ugly... and even worse: algae will grow. The easiest cure is to replace the bulbs. I've been dragging my feet on this project out of sheer stubbornness. I really wanted to change them out when the 400g was back. That's when I have to take ...