i really didn't know where this goes but i am gonna put it here i need a little advice about my female guppy. first to start off with is my tank size and stuff. 20 gal no planted sand substrate. i just checked the water levels and everything came out good they are as follows: gh:7 drops, KH: 7drops, NH3: 0mg, PH: 8.0, Nitrite: > 0.03mg. i have notice her behavor as in swimming is not the guppy way she sometimes swims veritcally up and down like her head is weighing her down there is a dark spot and she is more bloated then ever. other fish are fine. she normally swims around the tank or just hangs in one of the corners.