If you get "pool filter sand" which is heavy and graded to be back washed, it will not be sucked up as easily as something like "play sand".
I have not found PFS to need to be purged of hydrogen sulfide gas any more than any other substrates, because it is dense, and debris doesn't easily work its way in, and rot.
And more than just substrate, I have found having the back and two side walls of my tanks covered with black, will keep all cichlids colors from washing out, I spray paint styrofoam panels black, because these panels also help stabilize temps. and hold in heat during power outages.

same species of cichlid without black panels

JDs colors reflect all the topography where they live in nature, instinctively matching surroundings. You can see in the videos below, and compare colors change in the beginning where deeper water, with caves and dark areas provide cover, to the end where the JDs are in a kind of open grassy plain.
Eden2
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