I've never used it, but one serious hobbyist had excellent results with African Violet Mix and recommended it highly. I don't see why it wouldn't work.I was at my local garden center to buy potting soil for my first NPT. However, every type I looked at had slow release fertilizer included, which I didn't want. However, I found a bag labeled "African Violet Mix" that looked promising, so I bought it.
Here are the ingredients - anyone had experience with this? Anyone have any trepidations about the mix? Additionally, the mix contains limestone which I would think would be ideal for buffering, but I may be mistaken.
Sphagnum Peat Moss
Remember that the first 2-3 months may require water changes and extra aeration to keep the fish healthy.