Thanks Freddie, and yes there an 80w UV-C (the C is more powerful than standard) in the big system running 24/7 at just around 1400 litres per hour, so very slow for extra killing capacity.
Its located in the ‘fish room’ outside and is very easy to maintain and get to when the bulb needs changing once a year
Its located in the ‘fish room’ outside and is very easy to maintain and get to when the bulb needs changing once a year