Foam and Bubbles

[Bmore88]

Ill take one when I get home to better illustrate what I think is happening.

As for the return.. the pump is a sicce rated for 1300 gph. I currently have approx 5-6ft and 8 90 degree elbows (way overkill.)

the elbows = 1 additional foot of head pressure and the chart that came with the pump says that comes out to around 200-300..

I can easily eliminate 3 of the elbows, probably even 4. This should bring me in range according to the chart....

However, as you mentioned, how this will translate to the overflow is what I am curious about.

Currently the drain in the overflow is not completley submerged as the water coming in is so slow it cant "fill" it. I was thinking if the flow increases to at least cover the drain partially it will eliminate some of the air getting sucked down.

 

[Ou8me2]

Looks like sand residue to me. Did you use just normal dry sand?

 

[Bmore88]

I used old dry sand that was rinsed.. and then a 20 lb bag of "live sand." I didnt wash the live sand because I thought it would remove any of the healthy bacteria cultures or spores or whatever they add in them.

 

[RWEngineer]

1 foot per elbow seems high. Using the headloss calculator does not show that much loss.

 

[Bmore88]

I dont remember where I saw that it equaled 1 ft of head pressure per elbow.... But also I am using 3/4" pvc...

Which calculator is that?

Is it possible I was expecting 700-800 gph to be stronger then it is?

 

[RWEngineer]

I downloaded the calculator from somewhere not sure where I found the link. I had to add the pump curve for Sicce pumps.

 

[Bmore88]

hmm.. Well I know its no where near 600gph because thats what the oveflow is rated for (CPR90S,) and its no where near hitting full capacity.

 

[Bmore88]

so here is the overflow...I think when the flow increases it will fill it so that the sponge filter is completely covered and without there being as steep of a cascade from the water falling it will result in less bubbles getting pulled down the PVC... also here is the bubbles as they exit the pvc into the sump.

Am I correct in this line of thinking?