Installation of large-scale ebb & flood return pits Share this post facebook twitter whatsapp linkedin At Citronex in Poland, construction is progressing rapidly. Underground, the installation of the return pits for the ebb-and-flow system is currently underway. Five of the total sixteen return pits are now in place, with the remaining units soon to follow. Once completed, these pits will be fully hidden underground but will play a crucial role in ensuring a reliable and well-controlled return water system for the greenhouse. Above ground, construction continues steadily: the installation of the horizontal screening system, the heating system, and the processing facility is moving forward despite the winter conditions. Preparations are underway for the installation of the concrete ebb-and-flow floor, which will be constructed over a 14-week period. Want to know exactly what we build? Learn more about Citronex