hi all im new here im used to keeping marine but i love the discus i was in need of some info plz . Im running a 260l vision with 3 external filters containing ceramic mater pete po4 remover and filter wool . I also have carbon in the intenal filter that came with the tank .Im stocking 2 discus at the min with 16 x ray tetras 3 bristel nose cats 5 corys 3 banjos 8 glow lights and 2 neons Ive been running like this for around 6 months now and wanted to no is this selection ok how may discus can i keep is the selection ok thanks oh i do a 20% change a week and to up in between the tanks open top with a luminar containg 4 t5 tubes thanks