Hmm, well...I'm slightly concerned, but not because of the minor aggression.
Last night (after lights were out) I noticed one of the EBJDs was kind of wedged between a plastic plant and the glass (in one of the low-flow corners of the tank). For a second I actually thought it was dead (didn't react when I put flashlight on it, and it almost seemed to sway slightly w/ the current, and its position made it hard to get a good look. Naturally, i gave the glass a firm tap tap, which spooked it off. *sigh of relief*, I assumed it was just trying to get some shuteye/rest in a low flow area.
I checked that corner of the tank when I woke up to make sure it wasn't still there, and it wasn't. I didn't have time to observe the tank before work though.
When I got home for lunch I saw the same EBJD sitting in the same corner as the night before, while the other one is actively swimming around/eating like it has been for the past week. Now I'm getting concerned something might be wrong with it.
I added a small dose of salt (1/4 of tanks volume) on either Monday or Tuesday just as a general tonic / stress reducer, also part of the reason for adding salt was to replace what was taken out from Saturday's 50g+ water change.
I can't see any physical change in appearance...no ich/fungus/etc as far as I can tell. Am I just being paranoid? Or is this lethargic behavior cause for concern?
Water temp is ~81. I've tested ammonia/nitrite the last 2 evenings and have been getting 0 readings for both. My nitrates are fairly low (20-30 range I believe). I didn't test them this week, but last weekend after the water change they were at about 20.
Should I do a water change tonight or wait until the regularly scheduled weekend wc? If tonight, what %? (if it matters, its a 125g tank).
Looking back I probably shouldn't have done this (as I dont know what/if anything is wrong), but before I left to go back to work, I dosed Melafix for 3/4 of the tanks volume.
What are you guys' thoughts on the lethargic behavior, sitting at the bottom of the tank in a corner inbetween glass and plant? I took a few pics and a short video of it sitting there, but you can't see much. I'll try to post them tonight...