Harrings Bio-Weights designed to biodegrade over prolonged period of immersion in water.
web site and sales up and running 31st may.
More info on face book join group.
I still use my really old kjb two rod pod, its light as its plastic, two mins to set up and can be put on any ground, and have my third rod wherever I need it on sticks. Might not be the latest carpy thing but does the job! Simples