bo_ane

hi
i have 400 liter reef tank and iwould like to know how mush power light i need for tank depth about Cm ,i have bulb 150w (10,000k) because i see my corals not comfortable .

cerianthus

How about more details? L x W x H , Systems, etc.
How much LR? Water Conditions? Livestocks? How old since setting up?
150W being MH? Any pics?
400L if just little over 100G
More info given, better recommendation in return!!!

bo_ane

http://www.fishlore.com/fishforum/sa...alon-tank.html

and you can see all information in my profile

travie

You want to get your nitrates down to less than 1 PPM. Being at at 40 ppm could be the reason why your corals are not doing well. How deep is your tank? If you think a coral needs more light, try moving it up closer to the light. Closer to the light/surface results in the coral getting more light. How often and how big are your water changes?

cerianthus

Looking at your video, seem coral are ok except what you have at left lower bottom. Is it Goniopora/Alveopora? Maybe move up little!!

Although nitrate is bit high but with type of corals you have, should not be a major role, IMO. Can reduce nitrate by removing all the media from canister/clean it more often. Media will trap matters which will breakdown thus becoming nitrate factory. You profile does not describe the height of tank. 2 x 150 W MH= 300 W total output is not that powerful but also depends on height. Do you have any Actinic lighting?

Peterpiper

You may want to up the 10 000k to 14 000k, give it more in the blue spectrum

bo_ane

hi guys
my tank size = L 120CM W 40CM D 75CM