Too much light for frag tank

jmcmahon66 · 09/17/2006, 09:21 AM

I have a 20L frag tank setup with a 250W 14KK MH light about 8" above the water. I have several tiers of frags, and the top frags seem to consistantly bleach. I also cannot keep any zoos unless they are under a ledge/rock/upper tiered frags. Would it be beneficial to go to 20KK lights due to the lower PAR, or should I get a lower wattage light. The frags all come from my main tank which is the same color bulbs and wattage.
Thanks,
Joe

DeLiBoY · 09/17/2006, 09:55 AM

In a 20L

DeLiBoY · 09/17/2006, 09:55 AM

In a 20L

jmcmahon66 · 09/17/2006, 10:24 AM

Yeah, it's a 20 gallon Long tank. I don't know the exact demensions. It used to be my sump.

DeLiBoY · 09/17/2006, 10:28 AM

Seems to me you only need a 150. 250 IMO is way too much.

horkn · 09/17/2006, 10:29 AM

try going to a 20k bulb. its less money than any other option, unless someone would trade a 175w mh rig for your 250 watter.

and i really dont think that is too much light. maybe you need to acclimate the zoos with screening?

saltycreefer · 09/17/2006, 10:32 AM

lift the light off the tank another foot

jmcmahon66 · 09/17/2006, 12:46 PM

I think I'll try several options. I can only lift the light another 4-5", so I'll do that. I will also go with a 20KK bulb. That might bring out better color in my frags anyway. Thanks for suggestions.

09/17/2006, 09:21 AM	#1
jmcmahon66 Registered Member Join Date: Oct 2004 Location: Chicago. Illinois Posts: 439	Too much light for frag tank I have a 20L frag tank setup with a 250W 14KK MH light about 8" above the water. I have several tiers of frags, and the top frags seem to consistantly bleach. I also cannot keep any zoos unless they are under a ledge/rock/upper tiered frags. Would it be beneficial to go to 20KK lights due to the lower PAR, or should I get a lower wattage light. The frags all come from my main tank which is the same color bulbs and wattage. Thanks, Joe __________________ I ain't no hula-hoop-eyed, chicken-necked lookin' jive turkey. Current Tank Info: 150g RR Oceanic, 750W 20K MH with 300W 14K MH, Deltec Turbo 1060 skimmer, Tunzes with controller, all types of corals-but mostly SPS and Acans

09/17/2006, 10:24 AM	#4
jmcmahon66 Registered Member Join Date: Oct 2004 Location: Chicago. Illinois Posts: 439	Yeah, it's a 20 gallon Long tank. I don't know the exact demensions. It used to be my sump. __________________ I ain't no hula-hoop-eyed, chicken-necked lookin' jive turkey. Current Tank Info: 150g RR Oceanic, 750W 20K MH with 300W 14K MH, Deltec Turbo 1060 skimmer, Tunzes with controller, all types of corals-but mostly SPS and Acans

09/17/2006, 10:29 AM	#6
horkn Registered Member Join Date: May 2004 Location: milwaukee wisconsin Posts: 4,125	try going to a 20k bulb. its less money than any other option, unless someone would trade a 175w mh rig for your 250 watter. and i really dont think that is too much light. maybe you need to acclimate the zoos with screening? __________________ people write stupid things in this space Current Tank Info: 200g DIY wood reef, 2x 250w SE 10k MH 2x80 t5ho, 75g sump, Geo Ca RX, ASD 6" recirc skimmer

09/17/2006, 10:32 AM	#7
saltycreefer Registered Member Join Date: Jun 2006 Location: Fairfield,CT Posts: 1,696	lift the light off the tank another foot __________________ I love being a turtle!!! Current Tank Info: Got out of tanks for a little while.

09/17/2006, 12:46 PM	#8
jmcmahon66 Registered Member Join Date: Oct 2004 Location: Chicago. Illinois Posts: 439	I think I'll try several options. I can only lift the light another 4-5", so I'll do that. I will also go with a 20KK bulb. That might bring out better color in my frags anyway. Thanks for suggestions. __________________ I ain't no hula-hoop-eyed, chicken-necked lookin' jive turkey. Current Tank Info: 150g RR Oceanic, 750W 20K MH with 300W 14K MH, Deltec Turbo 1060 skimmer, Tunzes with controller, all types of corals-but mostly SPS and Acans

09/17/2006, 09:55 AM	#2
DeLiBoY Registered Member Join Date: May 2006 Location: Youngstown, OH Posts: 286	In a 20L

09/17/2006, 10:28 AM	#5
DeLiBoY Registered Member Join Date: May 2006 Location: Youngstown, OH Posts: 286	Seems to me you only need a 150. 250 IMO is way too much.