I am trying to figure out what is going wrong with my wisteria, I have searched and read several similar threads but haven't found a definite answer on what it is and how to fix curling leaves and one stem turning black from bottom up.
I don't own a test kit so parameters are unknown, lighting is cheap led that comes with aqueon 45gallon combo, have used seachem root tabs months ago but not recent and am currently dosing liquid flourish. In similar threads I've seen this same problem occurring around the same time, about 8 months of the plants doing fairly well and suddenly taking a turn. Can anyone say for sure what this is and or how to reverse it? Maybe it's just too much plant and I need to trim out the bulk and old to let the new growth replace the old? I've seen in the other threads people leaning towards calcium deficiency, I'm kinda worried about adding any crushed coral or cuddlebone as I could harm my fish from what I've read, the fish are 1 reedfish and 5 danio. Thanks for reading and thank you for any help on solving this from what it looks me somewhat common problem.