I have four guppies in my tank. A few weeks ago one of them had fin rot, but thats under control now, and he's all better Now one of the other male guppies is behaving strangely, he's a tiny bit bloated and seems to have taken up residence on top of the filter. He doesnt seem very interested in food, and he's been just resting on top of the filter since yesterday. All my water readings are fine. Anyone know whats up with him? Thanks