Personally, I find this article? Not good. The glass is very thin and of 10 pieces are my two, down the shaft, already the "grooving" broken. In loose soil the water runs out in one day in half. The ground is soaked and The increased water level stops finally the further outflow. Is the earth very firmly, then plugged the outlet as with a cork and it comes out no more water. I have worried me Hydro indicator, placed in the pots about 2 cm high plastic trays (coasters) with holes. Before erupted a recess for the water level indicator so that they regurgitation on the ground. Flower with earth on top. Done. Works like orig. Hydro use pots and the soil fit back into the old pot. Costs a little more but not as much as orig. Hydro.
