H 2... oh, that's much simpler part 2
First it was cleaning water just by using the sun. Now its scallop and oyster shells.
Three students watched a documentary video of a Japanese fisherman throwing oyster shells in a pond and found that it cleaned the water. They applied the idea to scallop shells and found that it cleared dirty dish water in 24 hours.
They discovered the shells’ shape and chemical makeup neutralizes pH and also helps filter out coliform bacteria, sediment and heavy metals
Live oysters can clean water by filtering plankton and other waterborne detritus. An article here suggests that recycling oyster shells by heating and crushing them is an alternative way of creating a cheap water-cleaning compound.
I don’t know about scallop shells but there is an abundance of oyster shells here in Manila (because of its proximity to Bacoor, Cavite). I wonder if anyone is using this knowledge to clean water.
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