Hello! I am new to this forum and have been researching in other forums and articles to determine stocking choices for my 20 gallon long it is currently stocked with tiger barbs but it will only last for a couple more months, so I am deciding for my second stocking decision in my 20 gallon long and have came across some stocking options for my tank, I really like the idea of a "nano predator" so any stocking ideas / advice is appreciated!