HELP! Pump info needed

[Beverly]

I have this old reef octopus skimmer. Can someone tell me what size pump I need for it? What is the model?

http://i911.photobucket.com/albums/ac312/bcusack564/Mobile%20Uploads/20140607_104652_zpsjbtsy3cu.jpg (http://s911.photobucket.com/user/bcusack564/media/Mobile%20Uploads/20140607_104652_zpsjbtsy3cu.jpg.html)

http://i911.photobucket.com/albums/ac312/bcusack564/Mobile%20Uploads/20140607_104705_zpsw8gaovkh.jpg (http://s911.photobucket.com/user/bcusack564/media/Mobile%20Uploads/20140607_104705_zpsw8gaovkh.jpg.html)

[Big_Pun]

not sure what size pump but here are the models

http://www.aquacave.com/Reef-Octopus-Pin-Wheel-Water-Pumps-C790.aspx

[350gt]

My guess is

http://www.aquacave.com/Sicce-PSK-2500-water-pump-with-Pin-Wheel-Venturi-P2417.aspx

Looks like it would be the same pump i use to use on my reef octopus..