[ebichu]

I got 3ft tank (920x360x500) which makes 165 litre.
Im planning to get AquaOne metal halide (MG1000).

• Include 10,000 Kelvin Metal Halide lamps and blue PL lamps.
• PL ‘Blue’ lamps fitted: 4 x 18 watt
• Metal lamps fitted: 2 x 150 watt

1. Is this lighting too much as Im afraid if I get this light, I will get a lot of algae problem.
2. Does the blue light do anything for the plants ? Or its jus there to show contrast ?

Thanks in advance.

 

[Wasserpest]

Yes, that is too much light for a freshwater tank. It's not impossible to do, but the question would be... why waste that much energy?

The blue bulbs are for marine setups. Don't do much for planted tanks.

 

[ebichu]

Because I thought the light that I have now is not enough.
Its 4x36watt PL tube.

 

[Wasserpest]

I don't know... but I think with between 3 and 4 wpg your tank is lit sufficiently, and I would look in different places if your plants don't grow.

I use about half the wattage/gal on my tanks and pretty much prune weekly.

 

[MarkMc]

I have 2 175 watt MH pendants over a 55g and have for years. Tank depth is also a consideration with light. Pendants can be raised or lowered to adjust the light: halve the distance from light to subject and quadruple the amount of light and vice versa. IMO they just look nicer.