I started up a salt water tank jan 15. The rock is kupang rock and I was told it was fully cured so I figured it wouldn't have much of a cycle time. The tank was good for about 2.5 weeks. I got a rock covered in aptasia so I bought 2 peppermint shrimp and with in 1 week the shrimp died and the tank had ammonia. Now I can't get it to come down. I had bought 2 strawberry top snails and 2 turbo snails and all that's left is 1 turbo snail. There was a lot of crabs in the live rock as hitch hikers and in total 9 died. I can't stop this ammonia. Any suggestions?