Hi and welcome to the forum!!!
Love the fish - mollies are they?? Be prepared for some fry!
I can't see a heater in your tank though...Mollies are tropical and need a heater, unless your room is quite warm.
I would add some more substrate, personally I like darker coloured gravel as it really brings out the colours of the fish. I would also get some live plants as it's looking a little bare in the tank and the mollies will feel more comfortable with live plants.
Mollies are a great fish, very enjoyable to have.
There are a lot of posters on here who have excellent knowledge of fish and aquariums, don't be afraid to ask any questions! Good Luck!
