What ppi Poret foam to use?

[bradleyheathhay]

Planning out this canister filter and the bottom trays gonna be three grades of foam filter. Top later in the trap will be some floss while the first two will be grades of Poret foam. In the 1" thick size Poret offers 10, 20, and 30ppi. What two sizes should I use?

 

[The Zigman]

10 is pretty coarse... on the other hand 30 is pretty fine.
If you're planning on running floss anyway, I'd go with the 10 and 20... and skip the 30....

 

[BallAquatics]

This is from the SwissTropicals website.....

Q: how do you equip various canister filters with Poret® filter foam?
A: I recommend layers of 2-in foam because that size is easy to rinse and cut to fit with large scissors or a knife. Depending on the size of the canister, start with 1-2 sheets in 10 PPI (coarse), followed by layers of 20 PPI, and finish with 30 PPI foam. You can even remove all the media baskets to put more foam into the canister to increase the filter efficiency. I do not recommend fine filter pads, filter floss, or 45 PPI foam, since these materials compact quickly and clog the filter long before there is any need to clean the bulk of the filter material. That not only shortens the maintenance intervals (more work), the cleaning also disrupts the biofilm that actually makes your filter work. All such Poret® equipped filters will be both biological as well as mechanical.

http://www.swisstropicals.com/faq/

Dennis

 

[excuzzzeme]

I use 10PPI and I also use felt as a first layer in a wet/dry (sounds backwards but it works well). The felt I buy in large quantities from the local sewing store. The foam ends up being another bio media.