Gerry Darby from Lough Neagh partnership says he is "not surprised" by the return of the blue ... blue-green algae in the lough," he stated. "Also the fact that there's been very good, dry weather.

Brown algae, especially kelp, are used to extract another gel-forming product called algin. Algin absorbs water to make gels and thick solutions and can be found in ice creams and dry baking mixes.