I have the tek four tube version over a 75. It works quite well, but I do have some quibbles.
1) The existing actinic offerings aren't all that impressive. Wait for the URI's that are supposed to be out any day now.
2) Go with the regular GE 6500K for the daylight bulbs and save money.
3) The six and eight tube units really should have more than two switches so that you have the ability to incorporate a high noon cycle if desired.
Those and the pricing are really the only problems I have with these. Seems kinda nutty to me that you end up spending upwards of 50% more on top of the basic fixture cost just to load it with tubes.
Rather than sound like just a complainer, I will say that I do love how cool and quiet the fixture runs. The xenia and crocea both love it, but I've had to move a monti up closer to the light. (I'm running two 10k's and two actinics.) I've got a pair of the ge 6500k's due to arrive this week and one will be going in place of a 10K for starters.
In retrospect, I probably should've gone with a a six tube setup since I'm such a fan of clams and sps, but in my opinion, that much power draw and expense makes a pair of 175w HQI's worth strongly considering. I actually just scored a great deal on a used pair of 250's I'm considering trying out on this tank just for giggles.
Oh, and don't waste your money on the splash shield. It's just a cheap piece of plexi and not needed.
Cheers!
Dan
