07-05-2008, 09:45 AM
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Were I going with goldfish, I would go with white gravel over a reverse undergravel filter in a 55 to 125 gallon tank, a canister filter, a pair of double well waterfalls (Aqua-clear or Emperor) and a couple of airstones.
A 10 gallon is half the size of the smallest tank I would put a goldfish in. If you want to go with a minimal set up, a single goldfish in a 20 over white gravel with a RUGF, a single well waterfall, and a pair of airstones would work.
Sorry to nag in contradiction of you post, but a 20 is not hard to find, is not much more expensive than a 10, and is probably the difference between a goldfish dying young and living 20 years.