Mebbid
Aquarium Advice Addict
Monk: Oh okay thanks ^^ Are you talking about Ecology of the Planted Aquarium by Diana Walstad? I've heard very good things about the book, but the overall idea / plan seems to be readily available online, and the book, as you said, is rather pricey, so I don't plan on actually purchasing it. However if you're talking about a different book I'd love to see it! Thanks again
Matt: I've considered goldfish but as Mebbid pointed out, they get too large and demand too much from such a small system.
Micey: Oh okay, thank you for your advice, i'll stay clear of them in that case, as well as high PH fish in general. I didn't realize the PH of the water affected how toxic ammonia was O.O
pH in the aquarium won't bother plants in the low 8s. I've kept plants in that pH level for quite a long time and most that you will commonly run into in the aquarium trade couldn't care less if your pH is that high. Ammonia toxicity and pH should also never ever be an issue in an established tank so that's another thing that you shouldn't have to worry about assuming you aren't going to do a fish in cycle. However, following that I mentioned that Mbuna aren't suited to an aquarium that size already and most other Africans need the same size or larger tank.
If you care to see the effects of ammonia and pH
http://www.aquariumadvice.com/forums/f12/your-guide-to-ammonia-toxicity-159994.html