L200 is used for 2 species, Hemiancistrus subvridis and Baryancistrus demantoides. The Hemi is larger at 25cm/10" and the Bary smaller at 20cm/8". I don't know how fast they grow, but would guess 2-3" a year. Panaque sp. L191 have the potential grow 50cm/20" (and probably more), again I don't know how fast they grow but I've had similar fish (L027, L190) grow between 1-3" a year.