Seaweed
Colombine Seaweed is maerl for pigeons. It is especially rich in minerals and trace elements, including iodine which is essential to life.
maerl
crude ash 97% (32% ash insoluble in HCl), calcium 24%, sodium 0.31%, phosphorus 0.023%, lysine 0%, methionine 0%
Provide freely all year round. Mix 1 tablespoon seaweed through the grit daily. Refresh daily.