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Originally Posted by StirCrazy
ya, I had a 65X turnover with the 6" bedd, but when I upped it to 120X turn over it was insain on the sand bed so I had to keep it in the top 1/2 of the tank, when I got rid of the sand it let me even the flow out over the whole tank. and believe it or not high flow is one of the things that will prevent corals from bleaching from new lights, you just need tones of it.
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Holy jebus!
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Hmm, I have just been looking at lights myself so here is what I would do if you can only use 1. get a good mogal bulb enclosed reflector pendant. go with a giseman bulb say the 12.5K or "marine" I believe it is called (if AB's were easy to get I would go with there 10K but they are expensive and hard to get). and then run it with a newer style HQI electronic balllast or even better a digital ballast. (newer ones don't under drive the bulbs like the first ones 5 or so years ago did. A mogal based bulb will give you more coverage than a double ended will. actualy I believe there is some one on the board selling electronic ballast and mogal pendant for 75 bucks each but I am not sure what kind of ballasts they are. If you are using a hood you could use a retrofit reflector, but I mentioned the pendant style as it will be a little less heat.
Steve
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I thought the PAR of an HQI bulb was considerably higher than a mogul?? Ya, I really like the look of the Giesemann Marine (13K actually :P ). I have never heard of an electronic HQI ballast...? I was going to go with this one:
http://www.jlaquatics.com/phpstore/s..._ID=pfo-bh401q
What about this pendant?
http://www.jlaquatics.com/phpstore/s...ct_ID=pfo-hp8m
Here's J&L Aquatics' 400w mogul based bulb selection (they only have one 400w HQI):
http://www.jlaquatics.com/phpstore/s...ategory_ID=197