Hi Annie, I have carefully observed the attachment with your production, congratulations. As far as I'm concerned I just need a drum filter for my amateur koi pond. I already have a 90,000 liter biological filter. a 60W UV lamp, a 60 liters per minute aerator. All this for a pond of about 35,000 liters of water with up to 40 carp. What do you suggest me? How much does it cost in euros? do you ship to Romania? Thanks for the time you would like to dedicate to me.