Thanks for the info. I never thought that this type of rock could contain metallic substances that could cause damage to the tank environment. I only have about an inch of black sand in the tank mixed with some crushed coral and shell. I was told by my lfs
that lava rock and the sand I selected would be fine in the tank. But, now I'm not so sure. I really wish that I would have registered to this type of forum before I purchased what the lfs
suggested. I'm about halfway into my cycle and don't really want to change the tank. However, if changing the sand or simply adding more sand will help, I will certainly do it. I have a few pounds of lr
but will definetely replace the lava rock with some lr
so I don't cause any problems. Thanks.