Abstract: A solid laundry detergent composition including: (a) greater than 5 wt % detersive surfactant; (b) greater than 5 wt % carbonate salt (c) from 0.05 wt % to 10 wt % calcium carbonate crystal growth inhibitor selected from the group consisting of 1-hydroxyethanediphosphonic acid and salt thereof; N,N-dicarboxymethyl-2-aminopentane-1,5-dioic acid and salt thereof; 2-phosphonobutane-1,2,4-tricarboxylic acid and salt thereof; and any combination thereof; (d) from 0.05 wt % to 10 wt % carboxylate polymer having a molecular weight of from 3,000 Da to 10,000 Da; (e) from 0 wt % to 10 wt % zeolite builder; (f) from 0 wt % to 10 wt % phosphate builder; (g) optionally from 0 wt % to 10 wt % silicate salt; (h) optionally from 0 wt % to 10 wt % layered silicate; and (i) other detergent ingredients.