I have been running my 30 gallon tank for 2 months and it just spiked. I did a 30-40 percent water change and will check water again tomorrow. What I understand about spiking is when the ammonia starts to rise. Today for the first time it went to 0.5 ppm. So now do I just have to get the ammonia back to 0 and then I can get to octopus or do I have to mature more.