I've had cabomba in my tank for about a month & it was doing really well. It recently started turning brown & falling apart from the ground up.
I don't know why. Things I've been doing differently since planting it:
1). Added what I thought was fairy moss but turns out to be duckweed for extra filtration & shade about 2 weeks after planting the cabomba. It's proliferating like crazy but not to the point where i think
there is too much in the tank. My betta, Gandalf, likes playing in it.
2). Added my betta a little over a week ago.
3). Started mixing filtered water with tap water 50/50 in hopes to keep the ph down without having to add too much ph down or wait for driftwood tannins to get it down. (A little over a week ago)
4). Started pouring the liquid fertilizer in the corner of the filter box that is immediately drained into the tank instead of directly into the tank. Ha, I don't know if it makes a difference. I just though it would be nicely diffused that way from the flow instead of raining down on Gandalf.
I have been fertilizing the same amount once a week & have been using Leaf Zone aquarium plant food which is said to contain 3% soluble potash, 0.1% chelated iron
5). Oh yeah, I put my aquarium light on a timer so it's only on for 10 hours a day. I would leave it on longer (about 14 hours) before. It's 10 watts 5100k.