Search Results for ‘photosynthetically active radiation’

Good morning :) Coffee's on, biscuits, gravy, grits, hashbrowns, liver mush (eww), OJ, milk... Come 'n get it! See you all later.

as usual... i have no real idea of what they are, what the difference is and what are 'normal' levels anyway i was thinking of getting one of these: http://cgi.ebay.com/Digital-LCD-LUX-light-meter-50-000Lux-4-Camera-Photo_W0QQitemZ280110501119QQihZ018QQcategoryZ88669QQrdZ1QQcmdZViewItem but i...

Got frags of a monti cap and a monti dig about two weeks ago and haven't noticed any growth. So how do I tell if they are happy? The monti dig has it's polyps extended all the time, but has two white tips (had them since I got them). Are the tips necrosis or is it an area of active growth? The...

I was looking through sanjays site the other day and noticed That the bulb im using doesnt give out the best par... So im looking to go to a different bulb. I noticed that the geisman 13k has a really good par. Does anyone use them? Or seen one on a tank. whats the color like? I dont have...

Ok, so PAR values and the general scientific quackery aside... what bulbs do you recommend for an SPS dominated tank. You can select more than 1 if you have seen the same with a few different brands. I plan on running about 15k with 2x 250w on the outside and 1x 175w in the middle Ushio Radium...

I now have two SPS frags, compliments of skeety and a new small colony. All acros. Is it normal for them to be brown with small tenticles out? Never knew they had these?? The one I bought is brown in comparion to the purple tips with yelowish body I saw in the picture. Tips still purle...

I Just Picked Up A 78 Gal Salt Water Tank That Is 29 In Deep And 37 In Long. In The Hood Are Two 36 In T-12 Super Actinic R's And One 175w 20000k Coralife Mh Running Off Of A Aro Ballast. I Have It All Set Up And For One It Seams Realy Blue And For Two Dose Not Look To Be Very Brite. My Question...

Ok I'm gonna try this. The 'kids are super excited to have a tank in their room. so the tank has lights built into the hood- any ideas on how to convert that over to reef lighting? and here is the filter and biowheel... This was my freshwater tank from college, have no clue how to...

22 inches deep, 30long. What kind of complete hood would you get for sps, lps? I was looking at the hamilton 175w MH and 2*32w PC. Would this be too much? Would the water get too hot? Should i look into VHO/PC instead?

I read unscientific / impressions / hearsay that the 250 HQI is roughly equiv to the 400w Mogul base in terms of general reefkeeping. If that were true, does that mean that the 150 HQI is roughly equiv to 250w Moguls? Thanks in advance. (Yes I am reviewing Sanjay's site as I write this, it...

Coral Reefs (2001) 19 : 197-204 Major colour patterns of reef-building corals are due to a family of GFP-like proteins S. G. Dove A1, O. Hoegh-Guldberg A1, S. Ranganathan A2 A1 Centre for Marine Studies, University of Queensland, 4072 QLD, Australia e-mail...

I'm thinking about replacing my 400w MH's soon and would like someone to put this in a way I can understand it. I don't get all the wavelength, nanometer, etc.. Are these as blue as the 20k? Is the PAR acceptable? And anything else you can tell me would be greatly appreciated. Hopefully I'll be...

I posted this at Reef Central. I want to give it a try here as well. I would like to learn from this and share this information with others. Any knowledgeable responses are appreciated. Hopefully this will get those of us who are learning about lights a little closer to a more complete...

Just looked at Tanne Hoff's tank on another forum. He has a gorgeous SPS-dominated 160 gallon tank (30 inches deep) and lights it with 2 150W HQI's and 2 24W PC's. I've seen several successful (defined by how nice the pics look) tanks from european folks running about 1/2 the lighting that we...

I'm still learning about starting a reef. Right now I'm trying to figure out what lights to get. I've been looking at 48" 4 65W VHO with lunar or a MH. I don't know anything about the MH. Can someone give me advise?

I'm upgrading to a 56 gallon cube tank. I want to upgrade my lighting to a 250w metal halide/2x75vho system. What I don't know is what type of metal halides I should go with. What k rating I mean. 6500k 10k 13k or 20k. I'm wanting to get into some clams and sps corals. Any advice would be...