question about Lava Rock
Hi! I'm setting up my first planted tank. I bought a bag of red lava rocks from Home Depot to put under my soil to help raise the back and to give height to my decorative rocks. First, is it ok to put the red lava rocks on the bottom then organic potting soil then my sand? Next, does anyone know if they paint or add a coating to those rocks? I got the regular Vigo Brand.
Thanks for any help!