Hi guy,
Have anyone using either one of the below 4 types of black sand before?
CaribSea Arag-Alive™ Indo-Pacific Black
CaribSea Arag-Alive™ Hawaiian Black
CaribSea Ocean-Direct™ Pacific Black
CaribSea Super Naturals- Tahitian Moon
Which one is blacker and better in bring out the contrast of the coral colour?
How many lb of sand do I need to fill up 1~1.5" of 1.5ft cube?