F fishwatcher Member Joined Apr 29, 2005 Messages 2,032 Reaction score 0 Location South Carolina... Smiling Faces, Beautiful Places. May 30, 2006 #1 In a 10-gal tank, can I have 4-5 multis and 3-4 harlequin rasboras? I guess I mainly am concerned about the ph levels being ok for both of them. Thanks!