Black sand - Which one?

[Aqua Splendor]

Hello, 

I'm currently looking for black sand and I never used that before, but always dream about it!

Theres 2 sand I see that interest me:

Bio-Activ Live Aragonite Beach Live Aquarium Sand in Black

https://amzn.to/2IaP7b6

 

and

Carib Sea Arag-Alive Substrate

https://amzn.to/2I8UXtx

 

I'm curious to have some feedback it's for my nano reef challenge 365 competition.

I'm wondering if it still leach thing in the water, i'm thinking to go with SPS

 

thank you

ps: can't remove the format of the text =/

[naothan]

check my nano challange tank i have black sand i have no complaints Carib Sea Arag-Alive Substrate 

 

[Aqua Splendor]

Yeah I saw it, the gravel is bigger then what I want, I wonder what are the white pebble.

I often see people starting a tank with, but rarely people with establish tank and SPS

[naothan]

4 hours ago, Aqua Splendor said:

Yeah I saw it, the gravel is bigger then what I want, I wonder what are the white pebble.

I often see people starting a tank with, but rarely people with establish tank and SPS

the white pebbles are the smallest and lightest of the sand. and i have noticed threw vacuuming that they are all most  disappearing   i am sure in a year's time there will be no white left. if u want i can take a close up pic of the sand