Originally Posted by aunt kymmie
If they have engaged in lip locking I'd be tempted to say that the twitching you're seeing is territorial behavior. I've never been a fan of treating with meds for anything unless I was absolutely sure what I was treating for. If it was me (and it's not!) I wouldn't be so hasty to start dosing your tank with meds.
I am with aunt Kymmie, Always have feelings of reservation when contemplating meds if not certain of what it is I'm treating although I have done so on occasion with mixed results.
I kept a group of five discus for nearly three years before rehoming them to make room for other fish that interested me and to relieve some measure of stress that the Discus through no fault of their own,,caused me.
I might observe to see that the fishes poop was solid looking and well formed as opposed to clear and stringy looking which might indicate internal parasite. External parasites may be easier to spot.
If fish are eating well and otherwise acting normal, No darkening ,no huddling at the back of the tank facing the glass, both gills appear to be functioning ,no labored or rapid gill movement.no laying horizontally on the substrate, no excess slime coat production, eyes look clear and no pitting, fins held erect, then I might simply observe the fish and possibly step up water changes to twice a week for a while.
Could very well be fishes establishing pecking order ,or mock mating behaivor.
I have found that even though these fish are considered rather docile,,they are still cichlids and as such,, they can be disturbingly aggressive with each other.
Do keep the temp. warm for these fish. Cooler temps appear to slow down metaboloisim,which in turn slows down digestive process and foods can become harder to expel and perhaps contribute to greater risk of parasites from within, or possible bacterial pathogens.
I kept the group I raised from babies, at 84 to 86 degrees F and other than intial treatment for clear case of worms when I first received them,, I had NO troubles.