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The 660 will run up to four 24w, 39w or 54w bulbs and three of the 80w bulbs.

T5s do have a color shift. How quickly they shift will depend on the type of bulb (manufacturer and spectrum), the ballast that's being used and, finally, the temperture of the bulbs are exposed to.

Try a muriatic acid/water solution (10%/90%).

Is it Sunlight Supply? If so, they are a reputable manufacturer.

Have you cleaned the injector lately?

Originally Posted by mopar9012 20K is too much blue. Ill look at some pics. Not neccesarily. It will depend on the bulb / ballast combination. Bulbs "burn" differently on different ballast so if you look at bulbs on other tanks also look at the ballast they are driving that bulb with.

I'm currently using a 14k bulb (Pheonix). There are quite a few choices available but if you like a bluer look, you'll probably want to look at the bulbs that are in the 14k - 20k range.

Based on the description, that is a normal output (NO) ballast. Not sure what affect it will have on the ballast. Is it running hotter than it had previously?

The Aquaconnects are on the expensive side and somewhat difficult to find but I liked them best of any 250w SE bulb I've used (for growth and color). Another bulb to look at is the Coralvue Reeflux 12k. Which ballast are you using? Your ballast might be better (PAR and color) with particular...

You should be fine w/ 150w MH and 2 X 24w T5 actinics. I have the same setup over my 37 cube and it allows me to keep anything I want.

If the frag tank is going to be used to "grow out" frags, actinics aren't really going to help in the growing out process. In my frag tanks, I run 6700 and 10k bulbs to get the most growth.

Dosing on a larger tank can become a pain so you might start thinking about adding a kalk reactor and/or a calcium reactor as your calcium demand grows.

Individual reflectors would work better. You might also consider replacing the actinic with a bulb that will give you more PAR. The actinic isn't really going to benefit any growth.

The problem is finding bulbs for the T6 fixtures. You have way more choices with T5s!

reg WCs are always a good thing. I would think that any small skimmer, an air driven one or even a seaclone would just add to the WCs.

An air driven skimmer would work. I still have a few that I use on occasion.

Make sure the bulbs are installed correctly

I've used one on a smaller system (approx. 45g) and it did fine. Notwithstanding the manufacturers rating, I'd be hardpressed to recommend this on anything larger than about 60g - 75g total water volume, if the intent is to have a predominately SPS tank. You'll be emptying the small collection...

Shouldn't be an issues as CSL used standard magnetic ballasts. You can find parts for them everywhere.

Any of those fixtures would do well with an SPS/clam dominate tank, even the 8 bulb T5 setup (as long as it had the individual reflectors).