My main tank has 4 bulkheads. 3x40mm drainage bulkheads and a 32mm return line. The drainage bulkheads drain into the right hand side of the sump. Which has 90l of k1. Next chamber has 50l of a mixture of matrix and eheim balls. And japmat topped of with some fine sponge. Atm the next chamber is empty atm. Yet to choose what media to use. Also have a 32watt uv and a fluidizied bed filter with a water polishing resin. Then pumps back to the main tank via a waveline dc 10, 000 variable speed pump
