I had a school of 7 tiger barbs in a 29 gal, but after purchasing a Fig 8 puffer who turned out to not be the community fish I was told he was. I had to move the tigers out. So I purchased a new 55 gal. and moved the tigers away from the puffer. I've heard if you have enough tiger barbs they dont bother other fish. I'd like to add a couple of angel fish to the 55. Would lots of plants and decor help matters any?