The purpose of this experiment was to analize the effect of different dosis of Hydrogen Peroxide (H2O2) in nutritive solution (oxigation) on the level of chlorophyll in the leaves of pure hydroponics italian pepper, Capsicum annuum L., placed in containers with water and necessary nutrients for crop development. The chlorophyll level of the leaves was determined with a manual chlorophyll meter (Minolta SPAD-502). Three different H2O2 dosis (0.75, 1.5 and 3.0 mM/L) were applied which were compared to a test without H2O2. There was a highly significant difference in the chlorophyll values througthout time, but that difference is barely significant when the studied H2O2 levels are compared. Based on the data we can conclude that the level of chlorophyll in the leaves results from a physiologycal process where the age of the plant is more important than radicular systems oxygenation values.