Sorry just some more question's
i'm running the aqua one marisys 240, do you think i should remove the biomedia or do you think i should get a external filter just for media like rowaphos and cardon seen one with a build in uv.
If i was to remove the bio filter do you think the 8kg of live sand and 15kg of live rock would cope with filtering the water.
i thinking of upgrading the skimmer anyway to a deltec mce 300 or 600, last thing is it possible to over skimmer your water and if so what are the effects.
Thanks for your help everyone