Carbon fines and filter socks

[HippieSmell]

Since it looks like carbon might cause HLLE, I was wondering what size filter would be needed to prevent carbon fines from entering the tank. Is it even practical?

What I was thinking was a 5 micron filter post GAC (ROX), with the flow through the GAC turned low, less than 10 gph. Or, maybe even using something like the dual BRS reactor, where the first chamber would contain the carbon, and the second would contain a sediment pre-filter, which can range anywhere from 1-50 microns, I believe.

Any idea what the lifespan of a pre-filter might be? I think they can be found for less than $2 a piece online, so they're not terribly expensive, unless they need to be replaced every day.

Feel free to move this to a different forum if it doesn't fit here.

 

[elegance coral]

I just rinse my carbon VERY WELL before using it, and run the discharge into a 100 micron sock. I also make sure the carbon isn't moving in the reactor. The micron filters in the one to five range, will clog to fast to be practical in our systems.

 

[HippieSmell]

Thanks. What's the flow rate through your sock, and how long does it last?

In the carbon/HLLE study, did they ever report the size of the carbon fines they found in the fish? There must be a range where they're most problematic.