making a small sandbox
I have a dirted tank capped with gravel. I've been wanting to add some cories to the tank, and because of this, I decided that I'm probably going to need to add a "sandbox" area for the cories. To do this, I was just planning on pushing some gravel aside and dumping some sand there. The sand won't cover that much of the tank, but I was just wondering if there was any particular way to do this. Will the fish (one betta) be bothered if I just add the sand in or should I take him out?