Posted: 14/07/2016 at 14:28
Personally I dislike the idea of crocks or gravel in the bottom of a sink. It just gives a big space where there is no goodness for roots
Definitely sounds like the plug hole is blocked though. When you have cleared the blockage, I cover the hole with some of the zinc wire netting sold for car body work repair or failing that, the fine mesh plastic bag which onions are sold.