50/50 tubes are close to natural sunlight in colour rendition (none are perfect), and plants tend to like them. If they have a high CRI number, they are showing you a close approximation of the true colours. If you don't like the effect, that is a different issue. You can changes tubes to change the appearance to something you like but it may not be what it naturally looks like.You can make your fish look redder or bluer just by changing the tubes. It depends on what you want. My preference is for a natural appearance, but that is just my opinion. Your tank needs to appeal to you.