scrubber for100 gal reef tank

[DennisC]

New screen and LED's been up and running for 1 week now. I have made a 7x7 screen this time as I think I underestimated the food I was putting in the tank and upped the flow accordingly. The lights are approx. 2" from the screen and on 18 off 6.
The only thing on the screen after 1 week is a light brown covering - sorry - no pics

Dennis

[DennisC]

After 3 weeks with the LED's and both sides are the same.

I reduced the lighting to 12/12 and the water flow to about 25gph. Is it time to push the flow back to the correct amount but leave the lighting as it is.

[mess7777]

That looks pretty green, I see some hairy stuff there too. Looking good!

[Floyd R Turbo]

So Dennis, just recapping here, you started this screen from scratch (new) and it took about 3 weeks to get this growth, with the lights about 2" away from the screen and 18/6 and flow at 25 GPH/in, is that all correct?

Did you clean the screen at all in the first 3 weeks?

[DennisC]

The lights were on 18/6 for the first week, but you suggested on another thread to make it 12/12 and lower the flow to about 25 gph so it has been set at that for the last 2 weeks. Not been cleaned at all untill today. I have cleaned both sides as the green was very oily both sides.
The lights are between 2 and 2 1/2 inches from the screen.

[Floyd R Turbo]

So in the pic you showed from 3 weeks ago (large pic a few posts back) that makes it look like the LEDs themselves are more like 4" from the center of the screen chamber - do you actually run them much closer than shown in that pic? (which I'm sure was to show off the LEDs...right?)

[DennisC]

Correct Floyd. The lights were further apart just for the pic. I have just remeasured and they are 4 1/2" from LED to LED, and the screen chamber is 3 1/4" outside measurement. 2 3/4 inside.

Just to recap, I am running 2 meanwell drivers, one each side.

Dennis

[Floyd R Turbo]

What type/model drivers, and out of curiosity, why run 2? I run all 14 of my LEDs on one LPC-35-700.

[DennisC]

I bought 2 LPC-35-700. drivers before I started and as I have them, then I may as well use them. It gives me the opportunity to add more LED's if required.

I seem to remember that you advocate 1 LED per 2x2 inch of screen. My screen is 7x7 which should be 12 LED's per side.

Dennis

[Floyd R Turbo]

yeah I just brought that up again on a thread Ace posted on, he uses one for every 4x4 area roughly and his does fine, also @ 700mA. So I think doing one every 2x2 is probably the maximum.