Filter bags safe?
 

Hi,

I have about one thousand of these filterbags....

they are a 3M 5 micron polypropylene filters.

can be seen here.

http://www.esgfiltration.com/pdfs/no...FilterBags.pdf

just wondering if these are safe to use in my sump?

if so, i have piles that i'd be willing to part with

I don't see why not, just curious if you have the 3M part number for them? I might be interested on getting some.

Let me try to post a pic of the box id

3M liquid filter bag

KD0107

P2-PET-F5

CT-0608-7798-3


sorry, couldnt get a pic loaded....

here's what it says on the box. I've been using one for the last couple weeks and just changing it out at the end of the week cause i have heaps....

everything is fine, super clear water....

5 micron would plug up in a matter of hours.

ya,

it gets pretty dark at the end of the week.

other than quick replacement, do you think there is anything wrong with going that fine?

Do these really have a steel ring retainer? That could be an issue if it is not coated in something inert.

Thanks for that. I think Rob is right about couple of hours it will be plugged. I was thinking maybe trying out some 50's.

the ring is covered and stays about 18" above the water line.

i just hook the bag in and let the pvc pipe run down into it.

the ring never comes close to the water.

I would be concerned with the fibre free surface treatment...what are they treating it with. Also it wouldn't take long before the salt water creeps up to that steel ring. I would never use one.

Good point,

is it possible to over filter with 5 microns and starve the tank of nutrients?