When you run a grassed swale in MUSIC 6.3 it has 100% removal efficiency for gross pollutants. The performance of the swale is also the same, regardless of whether it is 2% grade or 15% grade. Is this fixed in MUSICX?

MUSICX has the same underlying science as MUSIC 6.3. We recognise that there are opportunities to improve the way MUSICX represents a number of treatment options. As mentioned above, we will work with the MUSIC community to identify pathways to fund further improvements to MUSICX, noting that this will also require gaining widespread support from the community for  updating the relevant algorithms. 

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