You may have introduced something to the tank with the new fish, if you didn't quarantine them first.
I'm just not hearing enough symptoms to determine which direction to go in treatment wise.
Have you changed his food recently?
Try adding some epsom salt to the tank at 1 cup per 100G of water, and fast the fish for a couple of days.
Do you have a tank to remove the GT to in case you need to treat with meds the clown loaches may not tolerate?
Kim
I'm just not hearing enough symptoms to determine which direction to go in treatment wise.
Have you changed his food recently?
Try adding some epsom salt to the tank at 1 cup per 100G of water, and fast the fish for a couple of days.
Do you have a tank to remove the GT to in case you need to treat with meds the clown loaches may not tolerate?
Kim