Come to think of it the female platy has been acting a little strange and that's probably why. I thought the two gouramis would be okay because one is a honey and one is a dwarf, I will definitely keep an eye out though. Thanks for your advice!
Yeah I actually read that somewhere else as well, but when I asked the guy in the shop he said they were fine with just 2 or 3. I guess you shouldn't just believe what they say without checking first! I'll definitely look for them next time I go.
So I'm 2 months into my first tank, and I'm confused as to how many more fish my tank can take and interested in people's favourites that would fit in. Its 180 litres (40 gallons), it has 3 live plants (sorry don't remember their names) and some driftwood with a few good hiding places. The fish...