Aragonite

[Dara]

Thanks! Do you think it's safe to add some fish?

[dsaundry]

I wouldnt put any fish in it yet. First wait for the water to clear then I would still be giving it some time to cycle. If you must add fish, use chromis's to help the tank cycle.

[mark]

When I changed to the DSB the tank had already been up for a few weeks and had cycled with just the LR but hadn't added fish yet (don't need fish for a cycle btw).

If your tank is really new, it will need to establish (cycle) first. If you add to soon, you'll just end up killing things, go slow.

[Myka]

Originally Posted by Dara

Thanks! Do you think it's safe to add some fish?

I'm meaning no offense when I say that this question points out that you need to do more research.

Here is a pretty good reef basics website: http://www.reefbasics.com/index.html

Particularly check out the "Aquarium Cycle" section.

One thing I disagree with in the article is that they suggest you add your sand first, and then your rock afterward. I prefer to put the rock in first, let it cycle (you can siphon off detritus easily without sand), then add the sand around the rock. If the rock is sitting on top of the sand there will be a time when a critter digs underneath toppling the rock, and maybe even injuring or killing itself. If the rock is stable on the bottom glass without the sand, then is less likely to happen.

Regarding your sand, it may take a week for the sand to settle. There are many fine particles that don't stay down well until they have a (good) bacteria coating, which won't likely happen until a week or so after you add the rock.

[albert_dao]

You should ditch the sand for a couple months. As Myka stated, it can always be added after the cycle, or not at all if you prefer an easier system. Sand is like... auto lose for beginners.