The aim of this paper is to find out which Machine Learning (ML) model predicts the concentration of Chlorophyll-a, in the Palmar lake in Uruguay best. Currently there are no such models to predict the growth in this lake. The algorithms which will be compared in this paper are a Linear Regression model and the U-Net model. We will compare the losses of the two models to determine which algorithm performs best. The less loss a model has, the more accurate it is, and thus the better it is. The loss of the U-Net model failed to converge to a value, therefore it was impossible to compare the two models.