20L lighting question

[Don_Gnomio]

howdy everyone,

so ive decided that it was about time i started a new tank

i was thinking a 20 gallon long or a 10 gallon that i have sitting in my room. i know that i want MH so i was looking online and figured id get a 150 watt pendant, i do want to keep sps for shure.

now, the question is: will one 150 watt MH pendant be enough for a 20 long or will the edges of the tank suffer?

if anything ill just stick with the 10 but i would relly like a 20L

thanks,
victor

[121a]

get a good reflector and you should be fine.

[armagedon48]

you may have a 3 inch zone on each end that wont get the best lighting, but this makes for a good place to put zoanthids or LPS corals. i plan to do exactly what your doing, 20L with a 150W halide. i will have my overflow on one end, so that will take up some room.

[Don_Gnomio]

thanks guys 3 inches? thats not so bad...ok so i guess i will go with the 20L

[armagedon48]

i say that because alot of people say each halide will light a 24"x24" area and the tank is 30 inches long, so if centered, you have 3 inches on each end that are not covered. though with a good reflector, im sure these small zones are eliminated.

[Don_Gnomio]

ah, makes sense....

thanks again

[cherubfish pair]

I'm thinking of a 20 long myself. I have two Coralife 150w HQIs, but it's an abrupt change when they come off and on. I would like supplemental lighting for dawn/dusk and for actinics as well.