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well i have a 20 gal tank with a filter a heater a light and everything else. i have 9 fishies

1 swordtail
4 platys
2 albino cories
1 golden shark
1 gwarf gourami

im going to take back my golden shark as its getting to be about 5 inches! so if i give away my golden shark i will have 8 fishies in total. what other fish can i buy to stock up my 20 gal? i know the total amount of fish you can keep in a 20 gal is 10 fishies so i will need 2 more fishies.

The amount of fish you can put in a tank depends on the fish in there. 10 is not a magic number. But since you have removed the shark, I think the best thing to do is add one or two more albino cories. They would appreciate the company, and wouldn't over-tax your filtration.

HTH

I would definitely add more cories...they're happier and more active in larger groups.

Are your platies all one sex or mixed? If mixed, the minimum best ratio is 1M/2F, preferably 1M/3F.

As solublefish said, there isn't a certain number that makes a tank stocked or overstocked. The very general rule of thumb is 1" of fish per gallon, but there are other factors to be taken into consideration.

You might want to read [link=this article]http://www.fishprofiles.net/faq/begin-addfish.asp" style="COLOR: #FFFF99[/link] on selecting fish and stocking.

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