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Originally Posted by reefman1223 I have T5 HO's and am going to go with halides as well. I have a 38 gal and I like the T5 HO's but the growth rate on certain corals is better under the metal halides. Thanks everyone, It seems like I am going with the T5s with 156Ws which gives me about 5.3...

Originally Posted by fishfreak1242 What size tank is it? Its 30 gallons, which I had for over two years, but I am going to upgrade to 100+ tank once I settle in about a year. I read that Metal Halides heat the water too much, is that going to be a problem? Also, the original question about...

I was wondering if there is any significant difference between t5 and HQI, Metal Halide lighting for corals such as acropora, seriatopora, and mantipora species and for clams. Basically, given all else equal, can these corals and clams live under T5? Thanks in advance!