river rocks. not too big. mine spit em around all over the tank
i've heard of this too, i would be wary of the rocks hitting the glass of the tank.
river rocks. not too big. mine spit em around all over the tank
i tap on the glass and mine tries to bite my finger threw the glass
Ive read articles where people put bits of food in pipes and the rays learn to manoovre the pipes to get their treat