Been keeping fish for a few years now and still havent found the perfect set up for my fish. Now I know that many things can contribute to the coloration of a fish. Stress, diet and gravel are the ones I know of. My question is, what color gravel brings out the best color in fish? Does that depend on each fish species or can it be universal? Should it resemble their natural habitat? I have 5 channa bleheri if that matters and I want them to be at their peak beauty, so to speak.
Thanks for any help...hope this is the right section

Thanks for any help...hope this is the right section