Hi I just started my 30g brackish tank 5 weeks ago. I was cycling without fish for 3 weeks. 2 weeks ago I put fish in. One of witch I don't know the exact species but it's a freshwater Morey and the other was a green spotted puffer. I'm currently going threw the tanks cycle and lost the puffer today. I'm in the second stage of the cycle, the ammonia is now down and the NO2 is way up and this has been going on for the last 4 days. I've been doing 15% wc daily till the NO2 spiked then I did 30%wc daily but still lost the puffer. I don't want to lose the eel to. I can't seem to get the NO2 levels down even with 30% wc. I've noticed the water gets cloudy when this spike occurs. Any advice would be appreciated. Oh and I think the eel my be a g.tile but unsure. He's probably about 24 inches in length and looks way better than he did when I got him 2 weeks ago. The LPS said he was a pink lipped morey but I think they thought that because he was in poor health. He eats shrimp and loves it.