Hello all, Any suggestions for a solitary (or two) tank mate to live together with a school of silvertip tetras. The tank is a 900mm x 450mm x 450mm 180 litre heavily planted tank. That is approx 35" x 17" x 17" / 47g Sort of an aquascape(ish) setup. Currently 12 silvertips, will soon increase to 20 or 30max. I was hoping to find one big boy to keep the silver tips well bunched up and sort of create a landscape of a solitary Sheppard hearding his flock. Without eating them, of course... I have been looking at apistogramma but they're not much in size. I know that any aquascaper will probably tell me to stop such nonsense ideas and stick to a single species... Is there anything that might work? I am after the visual impact from the active dancing of the sivertips and a more gently moving larger fish. What do you think?