New L2

That was on a separate invoice & I didn't find it when I looked quickly. Which one, 1100 or 1400?

What is your total vertical head from sump water level to pipe?

 

The vertical head only applies above the waterline - so measure from the top of the water that the pump is in to the slot pipe - trying to ballpark your max flow before telling you to open up the valve

 

I'll take a shot and guess that it's in ~5" of water or so, which would put the vertical at 12", add 24" for the slot pipe = 36", if you open it all the way up you're going to get probably going to get 240GPH TAAM, Aquarium Products (go to "specification" tab) but it might be a bit more, so if you have the valve handle just a little off of fully open (maybe 15-20 degrees off of in-line) your flow is likely in the 220 range, which is fine. Opening it all the way is not likely to hurt anything, and you have a good base of flow, so you might try that and monitor the results.

 

Are you referring to the drain valve? As you back out the thumbscrew (counterclockwise) that opens the flap. Turning clockwise closes the flap.

What you want to do is start with it open (which is usually, effectively, 1/2 way screwed in) then start up the unit, get the screen flow where you want it to be, then adjust the flap closed until the unit runs silent.

After it runs silent (i.e. no air sucking down the drain) then you want to continue to close the screw/flap until you get the "static" water level inside the scrubber (on the ends, where the water fall off of the false bottom) such that it roughly matches the water level across the false bottom.

What you don't want is the water to cascade off the false bottom into a "lower pool" with would cause some air bubbles to form, because these will then go down the drain and turn into microbubbles.

Make sense?

 

Not personally, but the light slime (if it's kind of spongey & yellow) is typically an indication of too much light in relation to the amount of nutrients.

so if you are having tank issues and the dynamic has changed, you might need to adjust the scrubber settings

 

Usually intensity. You might try dialing back to 4 o'clock and going 24/7. Intensity is the instantaneous factor, if that is too high then the algae "locks up" when nutrients drop off. When you drop it down, the algae can absorb without excess light, and that can go on all day long.

So you might even back it off to 5 o'clock + 24/7 lighting.

 

What are your N & P at? Still dosing PP?

 

Yup, I would back off on the photoperiod, maybe down to 12 hrs/day, but leave the intensity were it's at (or even go to 6). Also. break up the photoperiod, as much as you want really - you could go 30m on / 30m off, repeating until you add up to X hrs/day of "on" time, etc.

Try to slowly back off the GFO. Heavy GFO use tends to cause the scrubber to grow yellow.

Any tank algae?