Nice. Your right stiffy, not the Baryancistrus species that is normally referred to as the GN, but is a young G. joselimaianus. Nice fish though, like the markings on the farowella sp. do you know which one it is. Looks like the vittata.
think a lot of people have that problem, once you find a way that works its ok. Used to feed a lot of courgettes to mine but attached it in the midwater, as didnt spend much time on the bottom.