freerunner416
Fishaholic

Ok if you wanted to make a rocky corner in your tank do you have to buy the rocks from your pet/fish shop or can you use any rocks as long as you boil them to kill any bacteria (obviously they may have minerals in them which could affect the tank and that is why im asking) ?? Would that be acceptable?
Also if you are putting a lot of rocks in will this put a strain on the glass or the tank itself due to the weight of them?? If your tank is upstairs or first floor flat should you watch what weight you make your tank??
Hope im not sounding too stupid asking this!!

Thanks again