Well here is the basic idea of the fish room, all is built apart from the sump. I have yet to connect it together and fill it up to see if the pipework leaks!!!


The tanks are 34"x15"x15", in total 300l of tank water.
The sump holds 60l (without media), and I have a 5000l/h submerged pond pump.
This will cycle each tank about 12 times an hour, with high flow rate.
As I have never built a sump before, what is the best media to use and in what order.
There will also be an timed actuated valve, that will allow approx, 15-20 l a day automatic water change from a 600ll settling tank in the roof

Can anyone forsee any other problems?
Cheers everyone
rob[/url]