well the temp is below 70 degrees for sure my room never get hotter than 70 even on a hot day because my room never get sun in it. the soil is the basket you gety it with from the petstore and is planted down with some gravel. The petstore that my famlily friend got it from said that thier plants are not tropical, mopre for freshwater fish. i dont know what that means lol. and i think it could be the water,not enough or too much i think. if i fill the tank 3/4, what could i make an island out of with homemade equipment?