I'm starting a Saltwater tank do i have to use crushed coral or can i use filtration sand?

Answer 1

Technically, I suppose you could use either,but sustrate made from calcium & magnesium carbonates (aragonite) is preferred. When keeping saltwater, you need to keep a stable pH in the range of 8.1-8.4. Most tap water, RO water, and distilled water is not that high, plus any of these sources of water usually removes calcium & magnesium as well (softens the water).

Aragonite slowly dissolves in lower pH water releasing carbonate which helps buffer the water so the pH doesn't fluctuate as quickly. It also releases the calcium & magnesium that the inverts & corals need (not quite as important to fish, but they still need some as well). Sources of aragonite are crushed coral, small or crushed shells, and oolitic sand. Sand used for pool filters, aquarium filters, and play sand is made from quartz, which provides none of the benefits of aragonite.

If you are planning to keep only fish and live in an area where your tap water has a naturally high pH, you could try sand, but I wouldn't recommend it over an aragonite substrate.

Answer 2

you can use either or , but the finer grade substratrate like the sand will be harder to clean come partial water change time , so if you dont mind scooping back out of the dirty water bucket then you are fine , i have used to carib sea live sand in my personal tank and love it , but some peolpe swear by the crushed coral , it is personal preference

Answer 3

both, but u need salt for the water too

Answer 4

niether u need to get the recipe for salt water the salt coraL WILL KILL THE FISH