i have a tire track ell that is about 18" he is only aggressive at feeding time(but only to his food).there is one albino ck about 12"in with him among other things. just watch for signs of distress. imo that combo will do just fine.my ell loves to hang out in a couple of pieces of black plumbing abs pipe1 1/2" in diameter(no glue) under a rock and facing toward the front of my tank. he is almost always there. gl with your fish,and keep us posted.