mr_X
Aquarium Advice Addict
Those SOLs can really cook corals. I would not be surprised at all if it turned out being the lights. I know a couple guys that killed a lot of sps before they got them dialed in properly and that was at less than 50%. This was switching from halides and high powered T5 units. My fixtures have no optics. The SOLs have optics to maximize light. Similar to T5HO's with and without reflectors.
Last edited: