Certainly the quality/price-tag of your camera will play a dominant part in the quality of photos taken, yet it is possible to get some half decent shots with any camera. I think you'll find the key is to spend time watching your fish with it in your hand, you'll soon work out the ideal areas in which the fish photographs best. Using a low quality camera myself, i generally find it best these areas have something else in the frame, to catch the eye of the viewer. Whether this be a plant, large piece of decor or simply a heater, even a patch of bare bottom. Having such things in the picture may not win any contests, yet i find it helps my own.
I use a really basic camera (Kodak eayshare C310) and i manage to get some fairly decent photos, i think. I use no specific lightling, nor techniques but the everyday fluro. I once used a smaller, different fluro for my Red devil, but it gave an inaccurate representation. Another thing i have found with my cam, when not using it's flash, use absolutely no zoom and keep it close to the glass.
Here's a few of my best.
And one with the smaller fluro i spoke of.