I wouldn't worry about fan leaves after 8 weeks flowering. Most plants lose them after eight weeks.
Dutch Pimp Reviewed by Dutch Pimp on . destructive issues Strain_mango. 8 weeks flowering. Soil_FF ocean forest. Lighting_Cfl Nutes_fox farm tiger and big bloom and molasses. Soil runoff no nutes ph between 6.8-7.2 Water ph before runoff no nutes between 7.2-7.6 Issues only affecting 1 out of 3 plants. Rate of damage is rapid,new damage daily. New growth affected same as old growth. Rating: 5