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Originally Posted by guaiac_boy 2.5 wpg for a 180 gallon tank is high lighting by almost any standard. The watts/gallon rule really breaks down for small and large tanks. 2.5 wpg over a 180 is probably similar to 4 wpg over a 20g tank, all other things being equal. If I went with HQI's I'd do it exactly like you...... one 150W HQI per 2' seciton of tank. You should be able to grow anything under that. |
Thanks for the info. Lighting for a 180 is certainly a tough decision. Now I am wondering if 3 150's is overkill for the type of plants I am looking at growing.
Cheers,
Mark.