i have a 25 gallon tank, with a variety of fish in. i have recently aqcuired 5 cherry barbs, and i think they are nipping the fins of my 3 male lyretail guppies. i want to take the guppies out and put them into a seperate tank, but the online guide reckons that they need at least 20 gallons. i think that this is excessive just for 3 teeny fish (including the long tails they are not even an inch long), i was thinking of getting a 20 litre corner tank for them, but not sure after this advice. anyone know?