Lighting for 90

[unagi]

I am setting up a 90 gallon tank. I have a 175 Metal Halide pendant from previous tank. Will this be enough light? If not should I buy another pendant. Or would I be able to take the light out of the pendant and place it in a DIY canopy and add some sort of retrofit lighting? Thanks

 

[electrikat]

You are going to need more light. That's not even 2wpg. Either another pendant or some pc in addition to the one you already have. You will need appx 3 to 5 wpg. That's 270 to 450 watts for a 90 gallon tank.If you will have to buy anyways I would lean towards the 5wpg for future expansion purposes.