03-31-2011, 05:30 PM
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Originally Posted by mamatoulouse
well i have admit i would be using fairly large 4"-2" sections of it for cichlids.... but i have just visited my local landscaping yard/store.. and found some petrafied wood in various sizes and mexican river rocks in black and Colorado rainbow river rock all for about 16cents a lb.. i want my tank to be mostly blacks and grey... i am wondering about how one safely makes sure rocks are ok for your tank.. also is petrified wood lighter than river rock?...
petrified wood is very heavy, i dont know how it compares to river rock, but its certainly much heavier than the usual stuff you find in stores. Rocks can be used for the aquarium if it doesnt react to acid tests. Pour some vinegar on a rock, if it fizzles, its no good, if nothing happens wash the rock and use it.