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#1
08-22-2009, 11:36 PM
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Average conversation is 71dB
Sound level Doubles every 3 dB so 36dB is ALOT quieter than 71  Ya gotta love PA. Im heading there Wed in PG. The fans may be enough? it all depends on your canopy, and lights. How sealed is it? where you place the fan's? I would try different ways. If wanting to remove the heat in the canopy, jusrt putting them in the top, pulling UP wuould work great. But then that does nothing for the heat that the lights put into the water. For that, fans blowing across the water, between lights and surface of the water are best. My canopy will have inlet fans on ends, and exhaust fans on top. Also, the more little fans you use, the more independently you can controll them. Get just the right amount of cooling needed at all times of the year. Gets a little warmer, turn a couple more fans on.
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Dan Pesonen Umm, a tank or 5 
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#2
08-23-2009, 12:23 AM
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Hehe, yes PA is awesome for some stuff. I also found some gas shock thingies like used to open a hatchback car for $10 each. I was going to use them to open the top and hold the lights up, but I think they are going to be too strong. They are 265 lbs, and only 13" long. Will take quite the lever to close them and I don't think an 18" canopy will be enough.
This whole DIY thing sucks...I really don't enjoy it at all. Grr... I didn't think of using any fans going upwards...that's a good idea. I need to figure out a way to have the lights out of my way so I can get in the tank easily. This is why I was thinking of using the shocks to lift the lights out of the way.
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#3
08-23-2009, 12:44 AM
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LOL, kinda funny, it's the DIY aspect that I love most about reefing. I allways like creating someting
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Dan Pesonen Umm, a tank or 5
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#5
08-23-2009, 01:24 AM
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LOL, Your avatar is sooo fitting for that last statement too
I can just picture it, sitting at your computer, scratching your head, wondering WHY in H@## would someone like that?? LMAO
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Dan Pesonen Umm, a tank or 5
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#7
08-24-2009, 09:13 PM
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86cfm is plenty - but don't have one pulling & one pushing... Use a passive air intake (down at the bottom of the fixture) both fans at the high point pulling hot air out; try to ensure you're not restricting the intake (lots of info on how to size an air intake can be found on google).
As for the gas charged shocks - Bet you'd find they're useable, but you might have to play with the moment arm a bit - becomes a trade off between opening enough vs opening/closing easily... Betcha bandit could make you a pretty drawing to show what I'm trying to say...
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