I have a 200 litters tank with 1 rosy barb, 1 red tail shark, 1 leopard pleco, 1 featherfin catfish, 4 siamese algae eater, guppies, mollies, platies all live in peace. But the algae is getting out of hand. I plan to buy some amano shrimps for their algae eating ability. Is this a good idea? Are...