Question for freshwater metal halide guru ;)
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Old 04-14-2015, 05:07 PM   #1
Swimnschools
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I have a 600 watt ushio metal halide dimmed down to 300 watts. I have this over a 29 gallon tank. Im running the walstad method with 5hrs on 4 hrs off 5 hrs on 10 off. How high above substrate or tank should a light of this magnitude be?

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It's very high above tank now. Been set up for about a week with very minimal algae. The algae I get is the hairy green kind sticks on my heater suction cups and some at the bases of plants. Should this light be farther closer or is it about right?

http://www.ushio.com/products/horticulture/hiluxgro.php
The lamp I'm using dimmed to 50%
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Last edited by Darkblade48; 04-15-2015 at 10:17 AM.. Reason: Please use the edit function for back to back posts to keep threads cleaner
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Old 04-15-2015, 04:11 PM   #2
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Help!
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Old 04-15-2015, 04:49 PM   #3
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Buy LED's...
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Old 04-15-2015, 11:46 PM   #4
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I ran 150 watt MH 40" above the substrate when the tank was newly planted and down a couple inches at a time after a couple months. This is a CO2 and NPK+M enriched tank. If no CO2 then I'd probably double the height.
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Old 04-16-2015, 12:39 AM   #5
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Added co2 today....... gave in thanks for your input greatly appreciated
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Old 04-16-2015, 12:43 AM   #6
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This is how it's set up I don't have a timer for co2 so I set an air stone to come on when lights are off. Is this a good method of doing this?
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Old 04-16-2015, 12:45 AM   #7
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Looking into less as well just seems anything high quality is in the 3-5 hundred dollar range which at the moment I'm not comfortable with spending lol if you have a GREAT(great being key word) led for 200 or less I'd be interested

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Old 04-16-2015, 12:48 AM   #8
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When I said less I meant LED's. Auto correct strikes again!!
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Old 04-16-2015, 12:55 AM   #9
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Quote:
Originally Posted by Swimnschools View Post
Looking into less as well just seems anything high quality is in the 3-5 hundred dollar range which at the moment I'm not comfortable with spending lol if you have a GREAT(great being key word) led for 200 or less I'd be interested
http://www.aquatraders.com/LED-Aquar...t-p/56575p.htm

Great as in high PAR ??
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Old 04-16-2015, 12:57 AM   #10
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Yes and the intensity to be effective through 20" of water future proofing here
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Old 04-16-2015, 12:59 AM   #11
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Quote:
Originally Posted by Swimnschools View Post
Yes and the intensity to be effective through 20" of water future proofing here
The Beamswork for $125 will do fine over 20" depth..
130 PAR at 17" isn't shabby.. What 100PAR at 20"?

Sounds like you are future proofing for a saltwater tank...

What I mainly see is wasting 50% of your electric bill..
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Old 04-16-2015, 12:59 AM   #12
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I might order one of those looks promising 108 watt panel sounds pretty cool I have a 135 watt ufo that I had over the tank but it's more for strawberries n such very red spectrum ruins the view of the tank

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Old 04-16-2015, 01:01 AM   #13
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Thanks for the suggestion that looks awesome I say it's worth trying! I love LED's I searched for days but never found those.
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Old 04-16-2015, 01:02 AM   #14
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Yeah or just a deeper tank in general I'd really like a 24x24x24 cube some day...
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Old 04-16-2015, 01:03 AM   #15
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My lady will have my head if I do salt water any time soon
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