skimmer overflow problems

[ducklabdad]

I currently have a redsea Berlin HOB skimmer running as a hob but off my sump. Under my 55.

It pulls about 1/2 cup of very funky skimmate every 2 days generall,

But here is my problem, every so often when I start it back up after feeding, et6c.. it will foam out like crazy, and overflow the cup.

It will do this for a few minutes and them go back to normal. There seems to be no reason for this I can track down. I clean the entire skimmer thoroughly ever 3 weeks.

I have no intentions of replacing this skimmer in the near future.

Does anyone have any suggestions on what could cause this??

[stugray]

If you set the skimmer too low ( in an out of sump design ) then the outflow of the skimmer forms a siphon.

Once you start it, it overflows until the siphon is established, then settles down & will run fine, but makes a mess.

I had the same problem with my AquaC run out-of-sump. I elevated the skimmer & made sure the outflow runs downhill all the way to the sump. That solved my problem.

Stu

[ducklabdad]

The outflow is above the waterline, so thats not the issue, and it only happens occasionally.??

I am very puzzled.