you should get a bigger tank for both fish and babies. they will be happier. at least 5 for platies, at least 3.5 or 2.5 for bettaYes. The tank sizes are about 1 gallon water. Both tanks have water heater with temperature of around 25. Having stones and Plants are plastic. PH 7-8.
get plastic or silk plants
you might need to lower ph a little for betta