Walstad Tank issues
Hello, I have recently had to start up my tank again after moving, and I decided to try a new method, the Walstad Method. I have used potting soil, and under half an inch of sand, just because it would be too much because it's a lot more compact compared to gravel and I didn't want to suffocate the bacteria.
I don't have a light for my tank, so I've decided to go with low light plants.
The store sold me CYPERUS HELFERI, Blyxa japonica and some small Sword Plant. Oh, and a floating water wisteria (c).
Basically the Blyxa japonica is dying, going brown and mushy, though the Cyperus and Sword Plant seem to be holding on. The store recommended those to me, so now I've just decided I might as well come here to ask for advice on what types of plants to get.
For the record I am planning on using this tank to breed Betta's.
My question is, should I pull the Blyxa's out? Or wait for them to completely die?
My second question is what are some good low light plants? Ones good for breeding and just for the whole natural setting to the tank, something to mimic the Betta's environment. The wisteria seems to be doing good, so I'm guessing the other Blyxa's are dying because they actually require STRONG light.
P.S: I live in Australia, so some plants aren't available to me and I'm very limited here, but your help is still very appreciated.