I've got the Coralife 30" fixture on my 29g that you mentioned. I'm a bit concerned about what you said in your first post. Are they discontinuing the manufacture of the bulbs for my t5ho setup?!?! Sad news if its true. I love this fixture.
I was just concerned about the availability ina couple o' years - no panic intended.
I went ahead and purchased 2X Odyssea T5ho
2 24W fixtures, 96W total. 2 ballasts, 2 independent fixtures.
I have to say what I bought is overkill, but I want to play around with some screening effects;
I'm setting them up side by side, but off set, spanning 30"...
- 1 layer screen on the 2 outer bulbs, leaving last 4" bare at the ends.
- a 2-layer area right where the fixtures overlap in the middle.