Clear water

[mseepman]

From the discription in your signature, your light sounds like an Odessya fixture or a Coralife Fixture.

The First of the two is a very budget fixture that comes with a few weak points that often result in a yellowish light. With a little elbow grease and a few dollars, this fixture can be made into quite a good one. There are a lot of threads about their stuff but take it with grain of salt.

If it's a Coralife, then I'm guessing that the bulbs may just need replacing.

[globaldesigns]

I use 14K pheonix bulbs, they are very nice and blue... also running 50/50 actinics with it.

If your bulbs are over a year old, I would definately replace... when I did mine, I couldn't believe how yellow my old bulbs where until the new ones were put in.

[Van-rookie]

I have a aquamedic aquaspacelight fixture 2x250 MH + 2 pc.
The previous owner told me that I only need to change the bulb when it starts flickering. true

[subman]

Originally Posted by Van-rookie

I have a aquamedic aquaspacelight fixture 2x250 MH + 2 pc.
The previous owner told me that I only need to change the bulb when it starts flickering. true

Definitely FALSE if you want to grow anything.

[fishoholic]

Originally Posted by Van-rookie

I have a aquamedic aquaspacelight fixture 2x250 MH + 2 pc.
The previous owner told me that I only need to change the bulb when it starts flickering. true

Not true, bulbs should be replaced once a year.

[mseepman]

And if you use low cost bulbs, more than once a year!

I also don't find PC's lasting a year no matter which ones I buy...they really only go 8 months with any strength.