Via email the developer of FreeAquarium, which as its name implies, is an application (Free software) for aquarium management.
According to its developer (who confesses to me that he is not an expert in programming), FreeAquarium has simulation (Simulation Model) that allows predicting NO3, PO4 and Fe values, from the analytical history. In the same way, it determines the risk of algae and informs if the current water conditions are suitable for the inhabitants that we have in the aquarium.
Free Aquarium is developed with Lazarus, and therefore it is multiplatform, so we can find your installer guidance on Windows, Linux and Mac. I invite you to download it and try it to know your opinion on it. At the moment a friend told me that they are missing Goldfish… 😀