Once the plumbing was done inside the tank then I could start on building the rock scape
So here's what 300kgs of Marco Rocks looks like.....
The idea was to build up layers of rock to create different levels and also keep the return flow as open as possible underneath.
here you can see the return pipe outlet, on this left side there are 10 outlets and 6 on the right side
As you can Imagine I spent many hours in there.....
Started on the right side
After some time I ended up with design that I had been planning in my mind for a long time.....
You can see that inside the space is very open and lots of place for the fish to live and hide
Next was to clean the sand and get it ready for the new aquarium. It was washed in normal tap water and then rinsed in 500ltrs of RODI water, there's a total of 125kgs of sand
One thing I always do is to clean the sand with a magnet, this is how much metal came out of the sand which was a high quality branded reef aquarium sand
Finally it was time to fill the aquarium with RODI, this may take a while.....
Actually as I had upgraded the RO system to run with 3 x 150gpd membranes then it was providing around 50ltrs per hour output with zero TDS