Methods of fracturing a formation including using a fracturing fluid including an aggregating composition including heterocyclic aromatic amines, substituted heterocyclic aromatic amines, poly vinyl heterocyclic aromatic amines, co-polymers of vinyl heterocyclic aromatic amine and non amine polymerizable monomers (ethylenically unsaturated mononers and diene monomers), or mixtures or combinations thereof in the absence of phosphate esters or amine-phosphate reaction products during fracturing operations to alter self-aggregating properties and/or aggregation propensities of the particles, surfaces, and/or materials in or entrained in the fluid.