Consists of a piece of PVC pipe 50cm long inside measuremnt of 3.8cm with male thread, reducers 2.5 cm. at each end, a plastic filter 3.8 cm. at the end nearest the outlet hose, a connector to the tap and to the greenhouse hose; PVC pipe is filled with Magamp, and the water run through for weekly water/feeding and is changed once a month. Au82-274