Gaps in sprites

Im making a game which is 2d. I made the sprites using Aseprite and it was a bit small so I resized them using the resizing thing in unity. I then duplicated them and held ctrl and moved them over so they all connected as floor tiles. I get green gaps between the sprites. I've turned off anti-aliasing everywhere and i'm using point filtering (not trilinear or bilinear) and im using the pixelsnap feature for my material.