How long have they been in tank? Could be acclimation. It also looks quite shaded down there.
I thought the mopani was an oscar, lol.
Check to make sure you tested the ammonia correctly...
Just a suggestion- remove any wilted leaves or dead roots when moving plants plus doing a 10% water change (at least), and using your waste water to wash all of the plants you are transferring can help with those spikes!! Remember to research your plants like you research your fish combo ofMI ammonia, nites and ph could wipe out your plant collection.... This is coming from first hand experience, I had a crash about a month or so ago.
'Scape looks nice.
Don't worry, in a few weeks that Wisteria will be tall again and soon after that it will take over your living room.
Lol, I forgot how quickly wisteria spreads!! My ludwigia repens is doing that right now- it's even growing sideways off of itself. You'll know the feeling soon, pattycakes, Good luck!!!!