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  1. B

    How often do I change bulbs?

    I keep my actinic T-5 on for 9-10 hours and my MH only for around 6-8hrs. I was getting too much algea growing on my live rock and sand bed. The cutting back on the MH's helped out alot and my corals look spectacular. In the natural ocean the sun does not shine at it's brightest for 12-14 hours...
  2. B

    How often do I change bulbs?

    The rule of thumb is to replace MH every 12 months. but be carfule when you install new bulbs, you may want to reduce the length of time they are on in the begining. The bulbs will have a stonger spectrum and you want the fish to get used to the new high intesity. You don't want you fish to get...
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