I have the red, and there is some suspicion that the red color is driving my Silver Aro insane...... Not sure what effect, if any, color has on poly's. My sen. bichir seems to like his natural color pool sand; however, there is a solid chance he's blind as a bat.
Personally, I think the red/black mix would look cool.
I personally perfer black sand. But i use pool filter sand and my delhezi has great color on him. Mixing maybe a good choice but overall i says use black sand.
Mix, you can't go wrong,,,, when buying the spectra quartz get the F grade the standard or small type is just to small,,, is this going in already setup tank?
If so make sure to turn off all pumps if you go with the small type.as it will float bc of static
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