Day 4, 12gal NanoCube DX

Step 1. Take fish out

Step 2. Take lava rock out

Step 3. Buy live rock to replace lava rock

Step 4. Wait a few weeks

Step 5. Buy snails/crabs

Step 7. Wait a few weeks

Step 6. Buy new fish

Step 8. Wait a few weeks

Step 9. Buy coral

I hope your fish make it to day 5. Tank should have cycled first before adding any livestock...then again, chromis are cheap to replace. Good luck, and welcome to the addiction known as "reefkeeping".

my input

take the fish back to the store read up on cycling the tank and get a test kit good luck

If the lava rock that you purchased is from volcanic origins, it'll be very bad for your aquarium. It contains high amounts of heavy metals that will leach into your water over time.

If it's man made, it's probably okay... though I still wouldn't risk it.

welcome to a site that will help you succeed. please use it

Research, research, research. Try reading the info in these links and see if these help. Otherwise, the forums in this site provide countless useful topics. Good Luck.

http://www.fosterandsmithaquatics.com/pic/article.cfm?articleid=419

http://www.thereeftank.com/blog/setting-up-your-saltwater-aquarium/

Or just google "setting up a reef tank."