Can I use the Raven tea filter with Corvo EKG? October 14, 2018 21:12 The Raven tea filter is not compatible with our Corvo EKG. We advise against brewing tea inside of our EKG kettles. Related articles Can you use the Corvo EKG kettle with a Stagg EKG base? How do I get rid of this stain inside of my kettle? Is there an Android app for the Stagg EKG+? What's the optimal temperature for brewing? Is Stagg EKG stovetop safe?