I usually shopped my bulbs around Thanksgivings. That tells I run my bulbs 11-12 months. I have no issue. I run 4 for 8 hrs and 2 for 9 hrs each day.
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Yes. Replace both metal halide and t5s every six months.
Sorry to hear about your crash.
I wouldn't think the spectrum would have changed that much.
All my crashs were always when I was on vacation.
I don't think the bulbs were the main factor caused the crash. Maybe something else.
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Looking good! I like watching your tank's progress since it's similar size and start date to my own. How was your experience with Vibrant? I tried it for a few weeks and had red cyano pop up everywhere. What're you feeding and on what schedule?