I’m not able to verify the exact sock count for the Eshopps M70 from the information available here, but Eshopps M-series sump listings commonly use one 7-inch filter sock slot, and related product listings for Eshopps show the 7-inch sock size as the matching replacement.

Best guess

For the Eshopps M70 , the most likely setup is 1 filter sock. That fits the pattern seen in Eshopps sump and accessory listings for the M-series and their 7-inch rectangular socks.

Why this is the likely answer

  • Eshopps product pages for M-series gear point to the Mariner M70 line.
  • Eshopps sells 7-inch rectangular filter socks as the matching size for its sump setups.
  • A reef forum discussion about Eshopps sump designs also references a single 7-inch sock format for Eshopps compared with systems using two 4-inch socks.

Practical note

If you’re buying replacements, look for 7-inch Eshopps filter socks rather than counting on a multi-sock layout.

TL;DR

Likely 1 sock, and it’s a 7-inch filter sock.