I ran 2 400W MH over the corner tank I used to have set up. I loved them. At that time I ran 20K radiums. I'm using one now with a 10,000K over a 65 Gal tank I have set up. Other bulb will be 250W but everthing is temporary till I get my corner tank set up again. A chiller is pretty handy when you use 400"s.
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