[SuperFudge]

Hi Guys,

That size of riser tube should work fine,on the few ive built in the past of similar design i found these types needed the most time to break in....
I think its becuase of the hieght of the injector where NEW tank water is being injected into the reaction tube,it has some effect on the bubbles that have already risen from the bottom....maybe being stripped of organics when they pass by the injector??
I found that it still worked fine,but seemed to need a few days after initial start up and after cleaning,before it really showed its merit.

I think your size of riser tube is fine,but i also think you are right,it may be better to have the riser extend to within 3/4" to 1/2" from the bottom of the cap....to keep from letting foam build up any back pressure and working against itself.

If you have any rubber couplers that would fit that outside diam,you can play with the hieght a bit before making any permanent mods to it.

Also,try making the out put tube(on the outside of the skimmer) at just shy(say 1") of the height of the water level you desire inside the chamber...before it can spill over into your sump...then you can reduce the water entering the skimmer more without it changing the water level.(this also was a big factor in getting it to work right....i had to slow down the water quite a bit without losing water hieght.)
And at the spill over point,do not put and elbow and pipe facing down twords your sump...this creats a siphon,you can place a tee at that point with a small length of pipe facing up(a breather),to avoid siphon trouble.

All in all,i think it looks like it should work fine....try giving it a few days and see what she does !

Merry Christmas guys,
Marc.

[ 24 December 2001: Message edited by: Fudge ]