feeler:3 month old tek 48" 6 bulb

[tang daddy]

Kennedy 2x400 over a 90g is overkill!!

The t5 tek fixture over my 120 with a depth of 24" is good and will not overheat in the summer also very energy saving.

If you are planning a 90g then the t5 is great however I wouldn't keep acro sp right on the bottom as they will not get enough light same with clams on the bottom they will fade abit. If you do an sps set up with clams and t5 the furthest you want to go is 14in anything after should be lps and softies or monti species.