Golfnut Posted February 9, 2006 Report Share Posted February 9, 2006 I was planning on moving my plants from my 19" tank to a 24" tank. Does anyone think the extra depth will make it HARDER to grow plants? Since it is deeper and the light is not as intense ... Thanks, Andrew Quote Link to comment Share on other sites More sharing options...
discus Posted February 9, 2006 Report Share Posted February 9, 2006 deeper is better but you will need to add more light Quote Link to comment Share on other sites More sharing options...
jvision Posted February 9, 2006 Report Share Posted February 9, 2006 If you start with larger plants, the depth will be great, and you don't need the extra light. However, if you're looking for anything to grow in the foreground, you'll need something like PCs or MH to get all the way to the bottom. I have a 55 gal with lights that are 18" from the bottom of the tank. Just over 2 wpg T6 lighting, and it didn't cut it for Glosso. Works just enough for E. tenellus, if it's not being shadowed by the Tiger Val &/or Crypt. balansae. I'd definitely prefer something a bit brighter - I'm thinking 2 x 96W PC will be my upgrade. Quote Link to comment Share on other sites More sharing options...
Mighty Prawn Posted February 9, 2006 Report Share Posted February 9, 2006 Where do you buy Metal Halide and how much is it? Say for 18" bulbs. -Hideo Quote Link to comment Share on other sites More sharing options...
Milan Posted February 11, 2006 Report Share Posted February 11, 2006 (edited) In my opinion, the only thing that matters in deeper tanks is the amount of light. If I recall my physics correctly, the intensity of light penetrating water decreases exponentially with depth: Id = Io*EXP^ (-k*d) Id = Intensity @ depth Io = Intensity @ surface k = absorption factor d = depth (in meters) So, I ran some numbers through this equation to see how much the the ratio "Id/Io" changes with the increase of "d" (from 0 to 24"), and for various "k" (1-5), and here are the results in graphical form: Edited February 11, 2006 by Milan Quote Link to comment Share on other sites More sharing options...
Golfnut Posted February 14, 2006 Author Report Share Posted February 14, 2006 Well I moved all the plants into their new tank on the weekend... we'll see if they grow ok or not. Thanks everyone! Andrew Quote Link to comment Share on other sites More sharing options...
fish_man Posted February 15, 2006 Report Share Posted February 15, 2006 i switched all my plants from a 20gall and a 15 gall into a tank thats maybe 6+ inchs taller than the 20galls. i noticed them growing faster. and then again im using lots more light and more ferts. the taller the less trimmin u have to do Quote Link to comment Share on other sites More sharing options...
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