If anyones interested, ive spoken to the a rep thst sells these lights. They have sold quite a few for fresh water planted tanks ill post his replies here.
We have sold quite a few Hydra for fresh water applications, if you use both lights keep white and reds quite high and blues low, there also won't be such a need to run both lights on high power. Half power should be fine on the whites with other colours balanced to suit
I asked what the reasons were for this and heres the reply
Tropical plants have evolved to take advantage of terrestrial spectra high in red light rather than zooxanthellae as the red is filtered out in deep sea water
Hope that helps anyone else thinking of using these lights in future.