newbi here and I am just getting started in hydroponics,so I have many questions.so my first question is has anyone ever used fish tank gravel as a
growing medium,I cant find hydroton in my area and shipping is to exspensive.the gravel I have was used in a fish tank it is natual with no color,it looks just like river rock but is about a 1/4 to 1/2 inches in diameter thanks in advance