100 to 200 litres/day (26 to 52.8 USgal.) at 3 to 6 bar (43 to 87 PSI) and 15 deg. to 25 deg. Celsius (59 deg. to 77 deg. F).
TUNZE® RO Station 8550 is a high-quality reverse osmosis unit used to produce pure water. In aquarism it is especially suitable for marine and fresh-water aquariums. RO Station 8550 consists of a 20 µm sediment filter, a 5 µm sediment filter, a 1 µm carbon sediment filter, and a TFC membrane (polysulfone compound). The average retention rate is 98 per cent, whereby the share of pure water amounts to 20 - 25 per cent of the processed water.

RO Station 8550 Manual