What size tank - more importantly, how *deep* is the tank?
250 watt Coral Life 4 foot lighting unit
Is this one, 250w MH
bulb? Do you know what type/color temp. bulb it is? 6500k, 10,000k, etc.?
A 250w bulb would be sufficient for a tank up to 24" deep for almost all
photosynthetic critters. However, a single MH
bulb will light only a 2' long tank (or a 2' section of a tank).
Moderate - to - high lighting is usually a reference to MH
setups. Total watts is really dependent on tank depth and width (one MH
every 2' of tank is standard).
Our setup is (180g tank)
3 x 250w Iwasaki 6500k bulbs
4 x 6' VHO
So, a total of 1,390w. However, this is not a "rich man's" set up. We choose the Iwasaki bulbs for the bulb longevity (up to 2 years) amongst other reasons, and DIY
'd the Halide setup for about $550.00 (VHO
's were additional).
Ok, so 5 watts per gallon, and i have a 55 gallon. I am 10 watts off. **** this hobby seems endless...
Watts per gallon is not a "hard and fast" rule. For 'shrooms
, polyps, and some hardy leathers, you can get away with between 2-4 wpg
. Some sps
's demand 6-7wpg and up, and nothing short of MH
lighting is recommended.
A lot depends on how deep the tank is, and where you choose to put the corals in your tank. A coral will receive a LOT more light if placed closer to the water's surface, than it will placed on the bottom of the tank.
Also, type of lighting is important. MH
is the most intense lighting, folllowed by PC
, then NO. Intensity is the ability of the light to penetrate the water.