Lighting for a 30g with SPS.

[wickedfrags]

On such a small system, the overflow to the sump would assist with pulling the warmest layer of water off the surface, specially important if you select a MH fixture (also removes the unsightly layer of surface film). It would also assist in cooling to a degree while the water travels to the sump. More water also helps.

I foot long pendant would cover 24"s nicely, put may produce a spotlight effect if placed to close to the water. This is by all means possible, expect lover light areas on the sides of the tanks.

The difference between compact florescents and HO T5 is shocking. A 24" HO T5 fixture would cover the tank nicely (both front to back and side to side) and would likely add less heat to the system. Go to a LFS and check them out if you can. I would never give up my 400W halides, but since I own a HO 8 bulb T5 unit (over my grow-out tank), well IMO it is worth considering.

Originally Posted by Stab_Master_Arson

No, unfortunately I don't have a sump. I have thought about making a 10gallon one in the past,, but it has never happened. What would the advantage be as far as lighting? More water to absorb heat?

Secondly, I have seen foot long pendants hanging over large tanks. They don't take up the entire length of the tank. Would that be possible with a 30 inch canopy?

Never really considered T5's. Aren't they just like Pc's though with a little added horsepower? Something for me to look in to.