You dont have any issues with ammanos and apistos in the same tank?
So far they don't even realize it's there. The apistos are over stimulated already with all the other cichlids, rasboras and cories flying around. I bought the largest one I could, so that should help too. The main risk would be a large apisto fitting it in the mouth. I saw a full grown amano yesterday at the LFS, they get bigger than most of those wood shirimp you see for sale!