[Cimmerians]

Thanks everyone, I'm planning on keeping mainly mantis shrimps (but never more than one at a time) for a long time but I've never dealt with the species before. In terms of tank info, I have nano cube filteration, LED lighting, 10 gal tank, shallow sand with tons of rocks ( but his beginning tank was tons of sand with little rocks), I've been feeding (or at least trying) him mostly shrimp kept frozen, but served to him thawed and on a stick. During his stay, the amnonia and nitrite levels were always 0 ppm but a nitrate level at a horrible 160ppm (or around that level) that never went down no matter how many water changes I did. Any contributing info that might be important to include is the fact that it's a mature tank, which use to be a reef before I moved it all to a 24gal tank to give the 10gal to my mantis. My shrimp seemed docile at first, but towards the end of his stay with me he was easily agitated, always punching his feeding stick or punching his rocks if I scooted the tank a bit. If any more info is needed please ask, I want to make sure I could provide my next mantis with the best possible conditions I could give it