Has anyone made their own live rock with oyster shells and cement? I think this could be a really cool way to make our own live rock in exactly the shape and size we like. The ratio is 1:3.1 by weight cement to oyster shell. Then use 50% by weight water for the amount of cement you use. I found this in a paper that was published recently - Relieving pressure from coral reefs: Artificial oyster rocks can replace reef rocks used for biological filtration in marine aquariums.
As an example, if you have a 10 pound bag of crushed oyster shell:
3.22 lbs of Portland cement CEM II with limestone
10 lbs of crushed oyster shell
1.6 lbs of water
The more cement you use the denser your rock will be.
In the paper they tested if this rock worked as well as traditional live rock at processing ammonia and nitrite - it does!
As an example, if you have a 10 pound bag of crushed oyster shell:
3.22 lbs of Portland cement CEM II with limestone
10 lbs of crushed oyster shell
1.6 lbs of water
The more cement you use the denser your rock will be.
In the paper they tested if this rock worked as well as traditional live rock at processing ammonia and nitrite - it does!