Dommi, I suggest that you get it out of the pot that won't provide any drainage, as the roots should
never sit in water, & good drainage is an absolute must. (It's better to under-water Anthuriums, rather than to take the chance of over-watering & "smothering" the roots.)
I care for my Anthuriums as I do my Orchids. Although my Orchids are in lava rock or bark only, my Anthuriums are in very light soil. (Lots of lava rock with some Perlite in peat-based soil.)
The temperatures in your house are a bit cooler than I keep mine, but I honestly wouldn't expect Anthuriums to be too happy at temps as cool as 15*C (59*F), so you might have to keep your heat a little higher at night. If I'm not mistaken, they do need to be at least 70*F (21*C) in order to bloom.
Plastic pots aren't always very showy, but seem to be best for this type of
plant. You may want to work the little stones/chips into the soil when you re-pot it, as you're probably right in assuming that they were put there for appearance sake
(but they do the plant no good, being at the top of the soil!)I wasn't aware that Anthuriums could also live
without soil, until I saw some
growing on chunks of bark at a
plant store last winter!
I asked one of the clerks about it, & she said they do fine as long as they're kept moist (not "wet"), with the bark sitting in a container of pebbles in water. The bark draws the water up & the
plant's roots take in whatever they need.
I thought it was pretty cool, so I came home & divided my
plant & started the babies on pumice stone, with the roots held in place with twisty ties until they took hold.
They were fine for quite a while, but during the summer when the humidity was low, I forgot to keep an eye on the water level in the containers, & they got too dry & started looking sick. I decided that they'd be better in soil so I put them back into containers, where they revived & continue to grow.
By the way, welcome to the forum & good luck with your new
plant! Let us know how it comes along, won't you?