Halide or PC ?
I have a 33 with a 175MH and I wish I went bigger. If you have the money go with a 250. Don't buy small and cheap if you can help it. Also think about the future. If you want to expand then you will already have a good start. Now maybe if the price is really good you can with both and then use a 10000K MH bulb with out going to actinics.
Sometimes that is what I wish I did, cause even with a 175 I feel I am under lighting my tank by about 25%.
Cheers,
Patrick
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