Survey Says: Top Cation Logic Tree results, Weird Survey Selectsmart.com The top 4 Cation Logic Tree results of 76 participants. Percentages indicate the frequency of the self-selected participants' top results for Cation Logic Tree. Rate Survey Says (5=best, 0=poor) #1 18.4% K+ #2 7.9% Co2+ #3 0.0% Cu2+ #4 0.0% Zn2+