About potting soil... I mix my own, it just gives me something more to do with my
plants. I hate pearlite, as it always, eventually, winds up at the top, discolored and looking ugly. I use organic potting soil, grit a/o coarse sand I've sifted and washed from a $3.95 bag of traction sand I get at the hardware store, lava rock sometimes, sometimes some leaf mould scraped and screened from under deciduous
trees in the woods, stuff like that. It's not necessarry to do this, I just like to. I would eventually repot your
plants into some good standard potting soil.
HOWEVER never change two things at the same time! If these are new
plants to your care, get them adjusted to your water, light levels, ... , before you think about changing the soil, too.