01-26-2010, 07:04 PM
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If your tap water is close to pH 6, you have a lot of options for fish in a 10g aquarium. Any of the small South American characins (tetras, hatchetfish, pencilfish) and catfish (corydoras, Aspidoras) or SE Asian shoaling fish like the many rasbora species and the dwarf loach; all of these are shoaling fish that should be in a group of 5 or 6 minimum. Thinking of single fish or pairs, there are the smaller gourami (pygmy sparkling, dwarf, perhaps the Chocolate) and the smaller "unusual" bottom fish like whiptails or Farlowella.
I would suggest a group of bottom fish from the above, or a single fish if whiptail or farlowella; a group of mid-water fish like a tetra, rasbora, etc. species. Perhaps a group of 5 hatchets (the smaller species in the genus Carnegiella) could be added if the tetra/rasbora were quite small [as adults] and only one bottom fish like the whiptail or Farlowella. With live plants you could have 12 or so of these in total.
Good plants would be the smaller swords, crypts, anubias. These are not demanding, and tolerate less light (similar to the JF you have). I assume you have a light on the tank, a good daylight fluorescent tube or daylight CF bulbs would work.