Interesting. I feed phyto as well, but have never seen this with my EleganceOpinion no science behind it, I notice mine doing this to either flush new water through itself, kind of like cleaning, and when I feed phyto it does this, my thought is its trying to inflate with as much phyto as it can to eat it. Just personal experience no science...
I have the same parametersMine has never done this but likely an issue with :
Moderate light and water flow
nitrate < .4
phos < .04
Ammonia < .03
Here is Mine:
Mine doesnt puff out as much but it does retract a few days every couple months and will only have short tentacles for the time. Ive had mine for i think 4+ years nowDid your elegance ever return to a “normal” state?
Mine is super poofy right now. I didn’t know it could inflate that much. But I placed him just under an overhand that gets good light but not too strong for the purpose of acclimation.
As for water parameters, mine are:
nitrate < .5
phos < .04
Ammonia < .01
I've just not seen elegances inflate so much.