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Ahh. Ok. Thanks for the information. Now that I have some numbers I guess its time to try a build finally. Lol.

Keep the updates coming ace. I'll sure keep my eyes out for them.

Lol. Yup. The sensor is touching the lamp. I know it's unorthodox but its easy to compare lamps that way.
But if anyone is aware of a problem with that kind of measurement please let me know. ...

What is the par on your screen? Is it uniform? If not what does it range from?
Did you ever have a chance to measure par on a fixture like that used on an sm100?

I tested my leds a lil more and...

When you say 660 reds are less intense then 630 reds. Are you refering to par measurement?

nice growth. before ya swap out i have to ask. are ya feeding the same? any other changes that might contribute to the change in growth? just trying to cover all bases lol

thanks for update....

yup. thats the one. and i only use it for comparison. claims you can calibrate it using a fluorescent tube and setting the green bar at 546nm i believe. but the scale on mine doesnt move or i...

right. i just went with what HD had. im not aware of a local place in my area that carries the 54w t-5 bulbs and ballasts. plus expense was a guiding parameter as well. two ballast and a ten...

i believe these would work.

http://www.1000bulbs.com/category/f24t5 ... bes-3000k/

so if i understand what your saying. the bigger one would not help mainly because the algae in the dispkay will die at a certain rate. although bigger scrubbers can handle more food. the death and...

ahh. ok. that makes me feel alot better. thought it might have been something i had done. ok. so ill just shoot for 1500ish on screen and see how that goes. thanks for clearing that up. cant...

thinking of making a four foot version scrubber. screen would be four 11x6 screens lit by 8(4 each side) f32t8 bulbs with homebrew flat white reflector.

looking for thoughts as to whether this...

alright. gratz on the green screen.

good to see its doing well. and meeting expectations is truely sweet.

anyhow. been playing a little and my build is not quite up to par(lol) with yours. ...

what made ya try the biopellets?

nice growth. any progress on the fan cooling?

im thinking of trying a long version like the sm100. but with leds ofcourse. was it just the 55g sump that dictated your screen kinda square? or...

thanks. eleven pages. guess i got some reading to do now at work lol

two quick questions

is spectrum same from the mh to led and therefore the reason for wide array of leds in 48 build?
...

48 on 75g. sounds nice some builds i see use over twice that. do you have a build thread on it and/or the 29?

and for your heatsink. is it a finned design or a solid plate or angle shape? ...

Btw what model crees are you using? xp, xr-e, etc.

and would you be so kind as to post a front pic of the leds to see how they are spaced out?

have you checked temp on heat sink being...

yes blue was my concern as well. thats why i asked if you had reasoning behind your led choices. i think the nuetral white spills a lil bit more into the blue end. but im only looking at the cree...

great build. very nice job. keep us posted please

wondering why ya choose to mix neutral and warm white leds instead of all warm whites? and how did you decide on 6 per side?

and do you...

me too. i cheated and bought sensor only. you can use it with a multimeter that reads millivolts and every one millivolt equals 5 par.

wondering if anyone could provide par readings from an sm100 at the screen. or just some readings from 24" bulbs with reflectors.

im going to try leds and hope that equalizing the par to what...

Ahh. Ok. guess it's worth a shot for me to play around then. Thanks SM.

As for two pumps/units I agree. Not worth the saving to use just one pump. But my thinking was more being able to use...

Seen those. Actually thought about trying one I seen that used just the one drilled hole in the tank for overflow. But not sure it will work for mine. His was 1.5 mine is only 1.25. Might have...

Trying to design a sump to remove micro bubbles from main tank(aka bubble traps) so I can get rid of filter sock I use now and allow food to recirculate.

I'd like to employ continuous feeding but...

watching this thread now as I just purchase a 400g tank myself. Came with a skimmer but using an ats on my current 75g. and no way no how I'm skimming on big guy lol

But like you I'm...

Not sure if it helps. But couldn't you use a P-trap inline between overflow and ats pipe to replicate the effect submerging the pipe would have on the siphon? I haven't used either of these...

I've been reading through the faq's and find mention of 3-d growth scrubbers being the most efficent.

Are there any scrubbers geared toward maximizing this effect?

Could some of the veterans...