Compatible Prefilter Fine Pad Set for Eheim Professional 3 250/350/600 2071/2073/2075 and Pro 3e 350 2074 (4x Fine and 1x Blue)
Eheim Complete Adapter for 2071-2075/2076/2078 – KensFish.com
Amazon.com : LTWHOME Replacement Coarse Blue Pre-Filter Foam Fit for Eheim Pro 3 250, 250T, 350, 350T, 600/ Ultra G Pro 3 Filter 2071,2073,2075 and Eheim Pro 3e 350/2074 (Pack of 6) : Pet Supplies