Originally Posted by Zombie
Okay. My only worry about that is I'm keeping Cories and need smaller river gravel.
Be careful then, know what you're getting. Gravel made from limestone or dolomite (or crushed coral) will raise hardness and ph and this works for rift lake cichlids or livebearers but not recommended for acidic water fish like corys and tetras. While aquarium store gravel is more expensive, you should be able to trust what you're getting; and some carry it in bulk, much less expensive that the made-up bags. I have always used bulk gravel, the smallest grain size available (as far as I know) and my corys are fine. It is also not rough, like some gravels from landscaping places might be.