Originally Posted by thekoimaiden
If you want goldfish, upgrade to a 55 gal. In a 30 gal you would only be able to have two and would be doing huge water changes multiple times a week to keep it clean. Keep in mind, minimum requirements mean maximum care.
If you stick with the 10 gal and do have hard water, guppies or endler's livebearers would be great choices for you. You can have between 4-7 males in a 10 gal. Avoid females unless you want babies (and eventually overpopulation and inbreeding). Mollies and platies are also hard-water fish, but they need a larger tank than a 10 gal. They grow larger than guppies and are more active.
Oh wow! Thanks for clearing that up for me. I definitely could not house a 55 gal tank in my apartment. That is too bad because I really LOVE goldfish. At least I know what is a good size tank for them. Perhaps when I get a bigger place.
Thanks for the advice. I appreciate it. I had no idea about all this before I bought my 10 gal tank. Now I wish I waited. I definitely don't want to overstock fish so knowing this is great! I'm probably gonna keep the 10 gal tank and when my betta Raz gets better move him into it once it has been cycled of course.