hello again, i got alot of help from last thread but couldnt find out what substrate to use for my plants. i currentyl use the reguar stuff fish stores sell. i notice on alot of pics i sen of different plant tanks the gravel stuff was color of black and like a sand color. befor i assume what it is and waiste money what exaclty is th ebest to use for plants to survive the best? most the pictures i looked at today were all from the uk so could be different then america. i appreciate the help thanks, tj