View Full Version : K questions? 10,000 or 15,000

11/03/2007, 07:38 AM
Which should I use? Personal preferences aside what do the tank inhabitants want?
I have hard and soft corals and a clam.
I would appreciate advise.

11/03/2007, 07:43 AM
I'm no expert, but I have been checking into MH alot and it seems you lose about half the par just by jumping from 10k to 14k so I went with 10k my self and if I dont like the color I'll suppliment with actinics.

11/03/2007, 07:46 AM
I'd say go with the 10k bulbs to be on the better side. IF the color doesnt suit you, like salty said, you can supplement with actinics for a more pleasing look.

11/03/2007, 07:47 AM
On this link check out the bulbs you want to try and see the difference in par. I just looked at a 250 watt XM 10k and 14k on a M-58 ballast. The 10k was 137 PPFD and the 15k was 55. Thats a huge difference just to jump color alittle. Heres the link. http://www.reeflightinginfo.arvixe.com/selectperformancedata.php