I have Jungle and Italian Vallisnaria in my natural/Walstad tank. It's been doing fine. In the last 2 weeks, I had to treat my tank with meds for possible columnaris. I have a clown pleco with a white patch on his back. I treated with kanaplex and Furan 2. Yesterday, I realized my Val has completely melted. I mean, just brown, goopy mess. Obviously, since this tank is filterless, I'm freaking out. I've added more plant cuttings and floaters from my other tanks and am watching the parameters. Right now, the worst is ammonia at 1.00 ppm. I'm dosing with seachem Safe regularly to neutralize the ammonia. The fish are not showing signs of distress, no flashing, lethargy, gulping for air. I feed the fish every other day so they haven't been fed in 3 days just to decrease some of the bioload.
All of the other plants are fine. I have tons of crypts, some swords, a crinum calamistratum, a aponogeton ulvaceus, 2 dwarf lillies, some anubias, some java fern. I threw in some more dwarf lettuce and elodia to help with ammonia uptake and ordered a bunch of plants that I hope will be coming in soon. I plan to do a water change today or tomorrow to clean up the rest of the dead plants.
So tl;dr, did kanaplex and furan 2 kill my val?