Keeping a T. crocea in a 75 with 216 watts, T5. It's located about mid-depth ~10 inches. Doing great.
I'm keeping a T. derasa in another tank, same size, same lights, not fairing well, but it's new and when I recieved it the water it was in was freezing, so I'm thinking it was something else causing the clam problems.
Some say you can't keep light-intensive items under T5's unless you have individual reflectors, but I disagree.
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