Many thanks to all on advice bout my Grumpy Guppy. I have tried separating him from the others, and when I do that the others start harrassing each other instead. As suggested, it looks like a territorial thing. Today I am going to get new plants for them to hide in. I thought my tank was 6 Gallons, but it has been put to me that 6G is not sounding right for a two foot tank. Praps if I share the measurements, somebody could check for me? Tank is 24cm deep, 50cm long, 30cm high.cheers again for advice.
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