Sorry, yes they are 250 W HQI.

Preston

phuntsman wrote: I am running two metal halides (I beleive they are magnetic pulse start ballasts but not positive) with AB 10k bulbs

250 watt?

Took me a while to notice that Corey had put my tank on this thread, thanks again for your time and effort Corey.  I am running two metal halides (I beleive they are magnetic pulse start ballasts but not positive) with AB 10k bulbs (supposedly more of a 13k color) with two vho actinic's.  The biggest question that I had was the disparity in the par reading from one side of the tank to the other, the right side is a lot stronger.  The only thing that I can attribute it to is about four months after I got my lights I had one of the ballasts stop working and the Aquarium promptly gave me a new one, so could four months really have that drastic of an effeft on PAR reading or is there normally that large of a difference in ballasts.

Preston

Alright fine.  You talked me into it.  You supply the ozone unit and I'll supply the tank.

Adam

I was kind of looking at what tanks are on this thread and I think that tanks that are running ozone are getting better penetration to the sand bed.  Can this be confirmed?  I know ozone is supposed to clarify the water, and I would think the PAR meter would be a good way to confirm this.  A setup with the same bulbs, before and after running ozone would be the best way to confirm this.  Anyone going to start running ozone in the near future?

Fax