07-24-2008, 05:42 PM
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Java fern or java moss are the standard low-light plants that do well without ferts. Most anubias are pretty unkillable as well, although they're a little bit pricier since they grow *so* slowly.
Most cryptocoryne do well in low light, crypt wenditii is a good one. However, the crypts may require a bit of fertilization.
The two main ferts are liquid and root tabs. You can probably get away with just liquid fert, but the anubias or crypt (or another *rooted* plant) would benefit from a root tab as well.