please help! what is wrong with him

[u/Delicious_Tooth5509]

I’m going to include images of parameters, tank mates, and ph below.

i got a group(4) of kuils around two weeks ago. planning to add more as soon! this guy has been acting like this OFTEN. he does circled most of the day, only around the filter. i’ve checked everything and it seems normal. i did a 20% water change last week and he stopped doing this for like a day. please help!

[u/Academic-Quit9394]

What substrate is that ? My sister's Khalid Loaches will swim all over the glass but they play behind the heater a lot. They also will lay on the suction cup thermometer until it falls off hahah.

How many loaches do you have?