A Rayleigh-Taylor instability driven by ion inertia is suggested to be a source of additional growth for prompt striations following the saturation of the seed, kinetic, loss cone instability. The destabilization of Rayleigh-Taylor modes on the prompt striation scale size implies the simultaneous excitation of large scale size Rayleigh-Taylor modes. The long-term effect of prompt striations on large scale fluid turbulence and on the outer scale of the power spectral density may be minimal.