gregor_mendel said:While coco looks like peat, it is more similar to rockwool, in that it has at least 20% air when soaked (given that it is allowed to drain well). Bottom line is that it is difficult to overwater.
This problem is well documented on this site. Sergio shouldn't have to defend this statement at this point.
http://www.icmag.com/ic/showthread.php?t=81559&highlight=hydro+hut
http://www.icmag.com/ic/showthread.php?t=65544&highlight=hydro+hut
http://www.icmag.com/ic/showthread.php?t=78802&highlight=hydro+hut
http://www.icmag.com/ic/showthread.php?t=77070&highlight=hydro+hut