Hi guys. I want to possibly re-home my two male platies and 7 month old female fancy guppy. I have 5 corydrayas I want to keep. I have a 20 gallon tank. What should I restock with? Or should I just add some different fish here? It's such a lonely looking tank right now. I don't know what to do to make it fuller and give everyone some friends. I do not want breeding and I want to add shrimp for cleaning. Thanks.