sps frag tank lighting opinion please

[Briney Dave]

I have concerns that the lighting that I am using for my frag tanks is not powerful enough to promote growth.

The lighting is on loan from a friend and consists of twin 150 m/h with pc lighthing on the sides of the fixture. It is an older Odyssea but the bulbs are only a couple months old.

I have set two 20 gal longs end to end with the 150(s) centered over each of the tanks.

I am using a rack that holds the corals (nearly all sps corals) about half way up in the tank and currently have the light bar set 7 inches above the tank.

The frags have only been in this set up a few days so there is no growth yet but I am concerned because the tanks just seem so dim.

I do not have a light/lum meter to check with certainty but I still think I am under powered

Would anyone care to share their opinion please

 

[Esquare]

I just setup my frag tank (20 long) with a 2 bulb 36" Nova T5 fixture so if yours isn't enough I'm in trouble

 

[Burgman]

Hi,

Maybe if you put the 20L's side by side the light would be more intense on the corals.

Dave

 

[Briney Dave]

end to end puts a 150 centered over each. I think it would miss both tanks side by side with the space limits I have. The tanks have to sit on a side counter in my classroom.