Trigger emerald 20 sump filter sock replacements?

[Tjk]

What filter socks will fit the trigger emerald 20 Sump? Just any 4” filter sock? They seem a little oval to me. This is my first sump so just wanted to be sure. Thanks!

 

[Hersheyb]

Prob easier if u go with filter cups

 

[DARTHROB]

I can confirm that these fit the 20 sump fine:

https://www.marinedepot.com/innovative-marine-auqa-gadget-200-micron-filter-sock-4-inch