Quote:
Originally Posted by seagullnz
Oh, and i was thinking that maybe I would keep a layer of my black gravel in the bottom of the tank and then just put the marbles as a top layer, so that I keep the beneficial bacteria - plus I would have to buy dozens of bags of marbles to get the depth of the layer that's in there now.
Would this be ok?
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I layer my marbles over the gravel and haven't had any problems, except that I usually take the marbles out when I vacuum the gravel, otherwise they work their way down into it.
If you're looking for some nice smooth glass marbles, they have really good deals on them here:
http://www.save-on-crafts.com/vasgemmarsto.html