I have red sea 4" socks. That's why I now have an eshopps tankpossibly - but the hole is a bit undersized to a standard 4in filter sock - this is because the make filter cage of the NOSOK is also undersized to be compatible with Red Sea tanks.

I'll check the site out this weekend. No printer so I'll need two 4" no socks and two eshopps adapters if you offer any discount on multiple items


