Par meter in use? And question about lighting.

[Bruce Spiegelman]

Just installed a new fixture over my frag tank and would love to borrow the PAR meter so I can figure out what height to adjust it too. Also love to take opinions on this in the meantime.

Its a 25 gallon frag tank. 16" deep. The fixture is a 4 bulb ATI T5's with two Reef Brite XHO LEDS on either dise. How high should I adjust it over the top of the water for now so I don't shock the corals. It's replacing a 2 bulb T5 reef bright hybrid with a single XHO. The Reef Brite fixture was 8" off the water.

 

[Coral reefer]

12"

 

[Bruce Spiegelman]

12"

Thanks!

 

[Gablami]

I have the par meter now. Here's a line to use next though. Signup at the par meter borrowing thread.


Sent from my iPhone using Tapatalk

 

[Bruce Spiegelman]

I have the par meter now. Here's a line to use next though. Signup at the par meter borrowing thread.


Sent from my iPhone using Tapatalk

Thanks -- forgot it had a seperate thread.

 

[Newjack]

that's a lot of light for a 25 gal. tank

 

[Bruce Spiegelman]

that's a lot of light for a 25 gal. tank

Yeah --- I went back and forth on whether to pick it up, but the price was right. And it looks pretty bad-ass.......

 

[Bruce Spiegelman]

Just an update. I spoke to ATI directly about the light and since it's primarily going to be over SPS they thought it was a good fit. They did day to start it at 18-22" off the water line though! Then bring it down about an inch a week till I find the right spot.

 

[Coral reefer]

If you double the distance you get 1/4 the light. You doubled the light, so I say 1.5 x the distance should be pretty close to what you had

 

[Bruce Spiegelman]

If you double the distance you get 1/4 the light. You doubled the light, so I say 1.5 x the distance should be pretty close to what you had

That's good knowledge! Thanks.

 

[rygh]

Note that you can also just run with 3 bulbs for a while until corals get used to it.