Question about anti breeding?

[evil Nick]

So dummy me threw a couple guppies into my 20 long thinking all the other fish would eat the fry, well not quite.

I can probably fish them out and give them to the LFS but can SOMEONE recommend something that might go after the fry but not go after the shrimp? I have a guorami, blue ram , neons, other guppies and some others but everything is so spoiled they won't be bothered. I even went on vaca and didn't feed for like 5 days and they were still all there. I literally watched a fry bump into my guoramis head and neither could be assed to care.

Any tips?

 

[Andy Sager]

The first fish that comes to mind is a Gambusia. They are known fry eaters and I'd suggest a female for this since the males may mix with your guppies and you'd get all kinds of mutts and male aggression. Another choice would be a Platy or Swordtail. Both of these tend to eat fry as well.
Hope this helps.