I've had a male honey gourami for a couple of weeks, purchased online from a very reputable source. He had seemed happy. But yesterday his dorsal fin was clamped down tight. He was lethargic. He sort of sat on some driftwood. His color seems paler. His mouth works constantly. I've noticed some white scales around his mouth. Columnaris maybe?
Here's my data: 29 gallon tank, with live plants. 5 orange corydoras. 12 green neon tetras. Plus the honey gourami.
Ammonia: 0
Nitrite: 0
Nitrate: 15 PPM
pH: 7.4
Temp 76.8
I don't have precise hardness data, but I line in LA and our water is pretty hard.
Any suggestions?
Thanks.