Where can fine silt sneak through my sand filter?

[haybird]

Hello,
When I turn on my filter a fine silt like dust shoots out the returns for about 5 to 10 seconds,then
runs clear.
Its not filter sand and I don't even feel like I am catching it in a skimmer sock when held in front of return.
I don't think its a cracked lateral, as I had it apart in the spring and check very very closely.

My question is where else could this silt be sneaking through?

Thanks for any advice!!!

 

[Bama Rambler]

Fine silt can get through a sand filter. You can try adding a cup of DE to the filter and see if that helps.

 

[duraleigh]

what is your FC level? It sounds like you may be growing algae inside your returns.

 

[haybird]

I bump it to around 5 or 6 at night my CYA is 30. I passed an overnight FC test a couple weeks ago when I first noticed ,but could check again.

Thanks

 

[duraleigh]

Yeah, I'd take the FC up to around 10 for a few days just to see if things got better. I also suspect your pump run time could be increased a little if you're not running at least 8-10 hours daily. I would try both those things and see if the issue stopped. Post back if not.

 

[haybird]

Great thanks

 

[New2Me]

I don't see that you've listed what brand filter that you have, but you might have a problem similar to the one I described in this thread -
http://www.troublefreepool.com/testing-a-sand-filter-any-ideas-t19811-20.html
Good Luck, and best wishes