My shower drain has 4 plastic "teeth" that stick out into the center of the drain. From this I have found some stalactite calcium columns hanging down to the U bend. I tried to pull one of them up with needle nose pliers but it broke and the others are too far down to get to. This is starting to block the water from draining.
How can I get rid of this calcium build up?
An answer to a question on DIY suggested using white vinegar. I haven't tried that yet. The calcium isn't in the U bend so it won't be sitting in the vinegar if I pour it in there.