nope - just toss it on top and let er rip! I often pour a new batch on an existing yeast cake even when its not the same beer (as long as its not an extreme difference)
8-Paws Brewing Co.
Tap 1:.Nostromo Full Thruster Simcoe Pale (10g)
Primary:.Lodovico's Fresh Squeezed IPA (10g)
Primary:.Mudpuddle Oatmeal Stout (10g)