Terry
Member
Okay guys, using your valued advice I've moved the CO2 diffuser slightly so that the flow is not obstructed by the taller plants (Echinodorus 'Ozelot Green'). The spray bar (by trial and error) has been moved slightly higher to agitate the surface a bit more and have had to increase the CO2 slightly to compensate. It's been free of scum now for about four days so fingers crossed it stays this way. Many thanks for all advice given. 😀
