I’m currently in the process of building my own hydroponic NFT system. Sustainability is very high on my agenda and I want to use as little water as possible. Hence, I want to re circle the water in my NFT system and only drain the entire system when the crops are fully grown and ready for harvest. However, re circling the water does not get rid of the plant waste and hence, my EC values keep rising and rising.
For automation I want to use a pump that adds nutrients when the EC values are below a certain threshold, however with rising EC values this is a problem. Is it possible to even automate a re circling NFT system? If so, how?
Currently, I have a ceramic filter in the system.