The people at garf don't seem to have any issues with that and they have some rather nice stuff. I have seen it in tanks and had a piece in my tank for a long time( gave it back to my Bro-n-law when it got covered in GSP). I wouldn't do the whole tank with the stuff but cant see any issues with making base rock. You can add any number of food items to make smaller pores.
12-15-2007, 04:51 PM
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