baby fish...

Well, hate to say it but, if you didn't want a bunch o' fish you shouldn't have gotten guppies!

You said 4, how many females? They sometimes come from the store pregnant and, I believe, can store sperm for several spawnings.

Ummmm, thats probably not what you wanted to hear.

I don't know of any way to stop them, but you might be able to sell the babies. That would involve getting another bigger tank tho.

Or, you could let nature take its course. The adults will eat the babies.

That's probably not what you wanted to hear, either.

Sorry I'm not much help.

The baby fish are coming from the guppies most likely. Sorry, but most likely, you'll end up with 90 million fish. Do you know anyone with large preditory fish? Maybe you could supply them with good healthy feeders? In fact, you don't happen to live in California do you?

I use to buy guppies a feeder fish. When I got the last batch, it happened I had a empty 20 gl. tank and a spare filter, so I decided to give them a filtered home. Before, in an unfilterred tank, I would find dead guppies quickly. In this tank they are going terrific, and I've seen about a hundred baby guppies been born there. I take the bigger ones as meals while the babies are growing. Nice deal.