I have been cycling my nano 35 litre tank. I have live sand fake rock and 4 weeks ago I went to a shop and they said to put in some snails and crabs. So I got 2 snails and 2 hermit crabs and by accident a small starfish. For over 2 weeks now my no2 no3 and nh have been high and not going down. I new to this so wish I never got the livestock. I put in ammonia 3 weeks ago and added fluval biological enhancer. What do you think I should do. Leave it for longer. Big water change. Do you think I'm cycled or stalled.