I've just bought a GBK, about 5" from LFS. I've put him into my 160L community tank, which has GBA, Zebra loaches,, 2 pearl gourami and 2 bronze cory's in it. It has about 10 plants, and many nooks, crannies and tube shaped caves in it. My loaches aren't small, there mature adults, about 3-4" long. There seems to be a bit of a battle going on between the BGK and the loaches, do i need to be worried? I, and knowledgeable LHS worker, thought they would be fine, and suggestions?