Rabbi Chaim Twerski discusses potential issues regarding Bal Tosif regarding Techeiles.
QA:
Why Yeshiva World is Hesitant to Accept Techeiles if No Bal Tosif Tigra
Related Speakers:

Dr. Israel Irving Ziderman
Topic: Modern Scientific Discoveries Regarding Tekhelet

Rabbi Chaim Twerski
Topic: Halachic Issues Regarding Bal Tosif with Techeiles

Rabbi Yehoshua Yankelewitz
Topic: The Yerushalmi as a Potential Source to Identify Techeiles

Rabbi Bentzion Halberstam
Topic: Halachic Issues Regarding Techeiles Today

Rabbi Dr. Abraham Twerski ZT”L
Dvar Bracha on Techeiles