I have a 15g (uk) long, and at the moment i have 2 male guppies, 5 neons, and 2 amano shrimp. In the future im adding 2 kuli loaches and a dwarf gouramis (centerpiece). I have alot of hiding places and a couple of large plants Would it be possible to add a couple more fish? Maybe a bristlenose pleco and something very small or a another school of something small?