Trouble with ASM G-1

[aztbs]

I have been fighting for about 4 months to get my ASM G-1 to skim anything, and I need some help.

It has a sedra 2500 needlewheel pump that has been cleaned and examined and seems ok.
I have adjusted the water depth in the sump from 6 inches to all the way up to the neck.
I have used the foam sleeve and taken it off. I have adjusted the height of the return tube. I have applied the gate valve mod and taken it off.

The gate valve made no difference. It seems that the flow is not the problem, but it seems like I am not getting very small bubbles from the pump. I can manage to get it to pull out a green-tea like skimmate at its best and if I look in the cup, the "foam" coming up the tube is very airy and bubbles like it is "boiling". No real foam at all. What could be wrong?
Do I need to mod the pump?

I read about putting an elbow joint inside the skimmer from the input to send the bubbles straight down first. But I didn't think this would help the bubble size any.

At this point, I would think I should be way past the break in time. I could really use some suggestions!

 

[dwdenny]

might be the pump the G1X uses the 3500 I think. Have you check the venturi and made sure it was not clogged but sounds like the pump is not doing its job. I not sure maybe soem will chime in here. I am planning on the CSS or G1 or G1X myself.

 

[Paulairduck]

check the venturi for plastic

check the venturi for plastic

I would deffinitely check the venturi, I do this everytime when I get a new pump with a venturi, there is usually a little left over plastic on the inside of the venturi, where the air hose connects to the pump, You can use a small drillbit.

 

[aztbs]

OK, I am still having absolutely no luck. I took apart the Sedra and thoroughly cleaned it (it really wasn't dirty). I thoroughly checked and cleaned the venturi and the air tube looks clean and new. I let the skimmer go for a couple weeks to see if anything would improve, but it seems worse than before.
Has anyone else had this problem? Any other advice or things to try would be appreciated.

 

[fragaholic]

I have a G1 on my 55 and it has performed very well after the initial break in period. I have to empty the collection cup every 5 days (I skim wet).

Maybe try to contact asm, it might be a faulty pump.