Guppy vertical swim problems

Ksirio15

I have a female Guppy that seems to have an issue. She swims fine, however when she stops swimming and goes to just hang out in a part of the tank her tail sinks and her head rises so she is hanging out vertically. I thought that it may be swim bladder disease, but she has no issues swimming and is not flipping over or struggling. She is in a 55 gallon tank with other guppies, platys, mollies, cories, tetras, and a BN pleco. It is a moderately planted tank that has been setup going on 2 years ammonia and nitrites are at 0, nitrates are between 10-20, and pH is around 7.4. The rest of the fish are doing fine and not having any problems. Anyone have any ideas on what the issue is?

kitten_penang

does she looks like she's gasping?

Ksirio15

Not really, ig every once in awhile but not to frequently.

kitten_penang

try adding a little garlic to her food.just a little.see if she gets back to normal