I finally got some black sand for my 75...male GT, CLs and some giant danios. It looks awesome! Tons nicer than pool filter sand, although it costs more. I found it on ebay for a good price too. I got it from an ebay store/seller called aquariumsubstratesupply...so if you need black sand I'd recommend them. 100 lbs for $60, so it is a lot cheaper than tahitian moon sand.

