What's your par reading?

[renato120]

I got a par reading of 450/500. Sps only tank.
Im running an ATI 4x39w and a sb reef light actinic leds bar.
Is 500par a lot?

 

[Socalreefer4816]

At the top of your tank? What about the bottom

 

[renato120]

At the top of your tank? What about the bottom

450/500 where most of the corals are. Bottom is around 200/250

 

[Socalreefer4816]

I think that's the right range u should be in. Now just evaluate how the corals do and move them up or down accordingly

 

[mcarroll]

I got a par reading of 450/500. Sps only tank.
Im running an ATI 4x39w and a sb reef light actinic leds bar.
Is 500par a lot?

Corals seem to be happy enough down to what most folks measure as 50-150 PAR.

200-300 is a sweet spot.

2000 PAR is direct tropical sun at the water's surface, FYI. Corals do not require a ton of light. :)

 

[renato120]

Not much to move here. This is how it was. Fixture was closer to the water.
I raised now. My par is reading between 320 to 420 now.

 

[renato120]

This is my reading now.

 

[Eric23]

How's your tank doing with the 4x39w fixture ?? I have a 57 gallon 36x18x20 and I'm thinking of getting rid of my kessils and getting a 4x39w ati fixture. I saw a local guy with a nice mixed reef growing sps at the top like crazy under the 4 bulb and also had nems and a clam for over a year

 

[Eric23]

Everyone recommends the 6x39w but I don't think it's necessary

 

[Playa-1]

I'm about 350, The Aiptasia and Cyano seem to be happy

 

[TbyZ]

I got a par reading of 450/500. Sps only tank.
Im running an ATI 4x39w and a sb reef light actinic leds bar.
Is 500par a lot?

https://www.google.com.au/url?sa=t&...kIJzAA&usg=AFQjCNGebXuv7xsggMlhHpNGcO8eMHXnrQ