i did some testing with cement yesterday and learned a lot about that material which is nice. however, the result so far is not so nice and i do not like the basic color of it and will have to add some color to the cement.
im also experimenting a bit with different mix ratios to see how the material varies, but this will take some time since the curing phase can be really long (but i probably not need to fully cure for testing)
if anyone is interested in some details how to work with it, i found this to be very informative Delaware Reef Club
a test piece where i try a thicker layer to see how the stability will be and will probably cure it a couple of weeks
i also built in a filter cage for the pump, next will be to route the tubes behind the background