I have a 10 gallon tank with 7 male guppies, all except one I had since birth. The guppies are constantly chasing each other all day, non-stop, why is this happening? How can I calm them down- I would like to get more male guppies but I think they may not be able to handle all the activity in the tank.

your guppies are all male. They have probably reached sexual maturity and because there are no females in the tank, they are taking their frustrations out on each other by being aggressive and frisky.
Add some female guppies - approx 14 (a ratio of 1 male to 2 females) - and they'll calm down.
Incidentally, do you keep your guppies in a planted tank? Once you add females, there will be a fry explosion and the plants will give the fry hiding places.

I had 12 babies, about 2 days ago and I let the female back with the other fish, yesterday. The babies are still in their breeding net. I have a yellow male, which started right away, to tease the new mother. No other male does that, they leave her alone. I have a 25 gallon tank with 4 males, and two females (one of them the new mother)
I do not want her to get to stressed but he doesn't let her go... Do I have to send him to the F.R.E.E.Z.E.R of will he let her go after a while???


HELPPPPP

Add more female guppies. Generally you need a ratio of at least 2 females to 1 male guppy. Guppies breed constantly and you need to have more females than males or else the males can pester the females to death.

Thanks for the advice- I will add the females- however how will I prevent illness or disease from new fish? And how do I also prevent the mature guppies from eating the babies? Will plants be sufficient? Thanks.

Am interested to know on the last Q too ..
I've separated my pregnant female guppy for almost 5 days now but she is still not giving birth. Afraid she might be too stress & lonely.

To prevent passing disease between new fish and existing fish, quarantine the new fish for a week in a separate tank. In that week, feed the fish sparingly and keep an eye on them for signs of illness. If any fish die, remove them quickly so that the other fish cannot eat them. Fish eating sick dead fish is one of the fastest ways for disease to spread.
Some ppl medicate their new fish in the quarantine tank but I wouldn't recommend medicating tanks ever because (no matter what the manufacturers claim) medications do affect the filter bacteria. This in turn will reduce the effectiveness of the filter which can cause your fish to become ill - even if they weren't ill when they first arrived!!!.

The best ways to prevent the adult guppies from eating the fry is to make sure the adult guppies are adequately fed and to have plants in the tank which the fry can hide in.

Some ppl take pregnant females out to a separate tank before they give birth or put them in breeding traps. Personally, I don't think it is necessary or recommended. Not necessary because if there are plants in the tank, the newborn fry will use the plants to hide from predators. Not recommended because catching the pregnant female to place in a separate tank or breeding trap places the female under unnecessary stress. Also, breeding traps don't provide any hiding spaces and pregnant females usually hide amongst plants when they release their fry.

Dar - I suspect your pregnant female fish is both stressed and lonely. Are there any plants in the main fish tank? Suggest you return the fish to the tank and let nature take its course.

Hope this info helps.

Hi

I fully agree with Gus about putting the fish back in the tank. Although I'm still new at this, I've done a lot of home work on Guppies and their fry. Mine had her babies with three males in the tank, a chinese algea eater and one platie in there. They even swim around the adult fish without coming to any harm. I put in some shells and rocks for them to hide and their fine.

Kind Regards

__________________
The early bird may get the worm, but the second mouse gets the cheese.

Hi, thx. I will put back the female guppy to the main tank 2moro after doing my weekly 30% water change.

Thank-you for all the valuable information. My guppies have calm down since I added the females. When the babies arrive I think I will need to get a bigger tank. What is the best size? 55gal? Thanks.