02-09-2011, 05:53 PM
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Originally Posted by bettaowner101
Before Sunday, I had 2 fish in my 10 gallon tank, recently upgraded to a 10 gallon from a 5 gallon. So, before Sunday I had a Female Dalmation Molly and 1 Yellow Fancy Tail Guppy Male. On Sunday, I went out and bought 2 balloon female mollies and 2 male fancy tail guppies. Ever since I have added these new fish in, the Yellow guppy has been chasing the new fish and trying to bite them.. Is this normal behaviour? When I had just the 2 fish before, the Molly was usually the more aggressive one but now it is the other way around. The tank temp stays at 78F and it is filtered with a Power Filter. Any ideas why my fish is doing this?
Guppies are nippy fish, and when there is a group of them, they tend to argue until they find their pecking order. Give it a couple of days and the guppy should settle down as they all figure out who is running the group.
Watch the female mollies though, as the guppies also will try to mate with them. The guppies will nip and aggrivate the female mollies trying to mate with her which in turn can cause the female mollies great stress. But since you have 3 and 3, you should be okay. If the guppies aggrivate the mollies too much, consider adding another female molly to spread out the chasing and nipping. Or buy a tank divider and seperate the female mollies from the male guppies. A general guideline for them is 1 male for every 2-3 females.