White film in new sump

[cplawrence]

I got through moving my tank and had installed a DIY sump under the stand. It was made from glass tank with acryllic baffles siliconed into place. I had tested it a bit with fresh water before installing and the baffles were leak free. In preparation for connecting the sump to the main, I had set it up to mix some SW with my return pump cycling water to the return section using a PVC loop. However, a few days later, I am noticing a white film on just about everything in the sump and I have no idea what this could be from. I have not added sand to the refugium yet, so it should not be silt. Could it from the plumbing or something from the silicone? I was certain not to get mildew proof silicone. What should I do to clean this up before connecting to the main?
Thanks,
Chris

 

[roka64]

It sounds like it is from your sand. Both of my tanks had a "froth" on the surface. You should be able to skim it off the top.

 

[artoledo]

I would clean it before connecting it to the main. You dont want all that stuff settling in your tank.

 

[cplawrence]

It looks like the sort of film that I would get out of the sand, but there should not be any sand in the sump yet and it has not had a connection to the main yet either.
Chris

 

[roka64]

It looks like the sort of film that I would get out of the sand, but there should not be any sand in the sump yet and it has not had a connection to the main yet either.
Chris

Oh...Hmmm, could it be dust?

 

[artoledo]

Did you use any kind of cleaning products after construction?

 

[cplawrence]

After I finished installing the baffles, I ran FW through it to test for leaks. Then, it was drained and placed in the stand. No cleaning products were ever used, but I suppose dust is a possibility from the stand.
Chris