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<< If I try to buy gravel from a rock and landscaping supplier, what kind
> of problems will I encounter because the gravel is not designed for
> aquarium use? Also, how can I overcome them?
The stuff at these places may be high in carbonates, which will complicate
maintaining your target water parameters, unless you are leeping Rift Lake
cichlids and cats. You can beat this by testing with muriatic acid, available
at hardware stores and home centers. If you drop the gravel in a glass of
acid and it bubbles, not good. You can carry a bottle of acid with you while
shopping, or explain to the salesman that you want to take samples home and
why. Pack them in baggies and label them. Find something you like and go
back and buy some.