how long can you keep this sand in bag before it kills the sand

Usually every bag comes with an expiration date , I assume the live bacteria will stay alive till that time keeping it at room temperature, when I placed my order of sand, mine had a expiration date for more than a year . So I'm sure they send you fresh packed sand. I completely recommend it.

what is special grade?

The title is confusing on this item as "Special Grade Reef" and "Fiji Pink" are two totally different types of sand. Both are nice but the Special Grade is a bit bigger, if you go to there website you can see the differencehttp://caribsea.com/pages_caribsea/page_product_aragalive.html

My ammonia didn't spike at all. live rock is in, did your ammonia spike with this sand?

This is supposed to cycle your tank instantly... if you have an ammonia spike then you need more live rock. The bacteria in this acts as a filter

Can it be used for fresh water

You can use this for freshwater but it will kill the bacteria, but the sand would be fine to use. the one drawback though is it is aragonite sand, so a lower ph it could dissolve some and add too much calcium in your water. For saltwater you actually want some calcium to dissolve for the corals, but i don't think extra calcium would hurt anything in freshwater.

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🪸 Elevate your reef game with the pink power of nature!

P H STABLE SAFE - Maintains consistent pH levels, creating a safe and balanced environment for all marine life.
CRYSTAL CLEAR WATER - Improves water clarity by minimizing organic debris, ensuring your tank looks pristine and healthy.
CORAL GROWTH CATALYST - Enhances coral attachment and development, turning your aquarium into a vibrant underwater ecosystem.
NATURAL FILTRATION BOOSTER - Porous sand structure supports beneficial bacteria, stabilizing water quality and reducing waste buildup.
MARINE GRADE NATURAL SUBSTRATE - 20 lbs of premium Fiji Pink aragonite sand designed specifically for thriving marine and reef tanks.

CaribSea Arag-Alive Fiji Pink Sand is a 20-pound natural aragonite substrate engineered for marine and reef aquariums. It promotes coral growth, enhances natural filtration through its porous structure, improves water clarity by reducing waste, and maintains stable pH levels to ensure a healthy, balanced aquatic environment.

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