I am a bad bad fish-keeper.

[AlaskanCorydoras]

I recently got a new 55 gallon which I will be turning into a "blue" themed planted tank. (Blue platys, blue cories, possibly a blue pleco if I can find a l128, possibly an electric blue jack dempsey, neon praecox rainbowfish. . .) which is taking up the physical location where I used to have my 15 gallon. (Which has been my hospital tank off and on.)

Now I try to keep the hospital tank up and active, to keep it healthy. It is fully planted (At times densely planted) with java fern, a very active lily bulb, wysteria, and a goodly quantity of Duckweed. It also has a couple banded loaches enjoying the relatively high current, and digging through the substrate, and a bushynose juvanile on maintainance duty.

To keep the plants happy, however, it needs a slightly higher bioload. So I put some feeder fish in there. (about a dozen)

That happened to turn out to be endler's livebearers.

This was 4 months ago.

Endlers are a type of guppy. That breeds faster than normal guppies. Every 23 days females will produce a brood. They're ready to breed at 2 months old.

So today I removed ~50 of them from the tank. . . and sent them over to my 90 gallon.

My 90 gallon is my Cory/Rainbowfish tank. Now Rainbowfish are peaceful fish, but are VERY enthusiastic eaters. I recently observed some of them spawning in the tank, which resulted in a feeding frenzy.

As did adding ~50 squirmy little guppies to the tank. Ten of them bought it before they found the safety of the planted areas of the tank (my 90 is lightly-moderately planted) and are now huddling there in fear. Well, except for the big females and males who are too big for the 'bows to eat. . .

[L number Banana]

Well, you're not alone!
My big pond goldfish had babies very recently, I wanted to save some of the fry to put back in so I moved some to the Danio pond so the parents wouldn't eat them. Didn't know Danios were such voracious carnivores!! They all look quite fat today.

[Bas Pels]

Feeding fish to predators is, indeed, somthing to do with care, not all at once - unless you want the feeders to have a sporting change

I'm afraid you will have to empty all tanks ever contaminated with endlers

[AlaskanCorydoras]

If they survive, they survive. If not, well, The 15 still has probably another 50. . . (Yeah that means probably ~100 of the buggers in a 15 gallon tank! The water quality has always been good though.) I'll put as many as I can catch into the 90 next time I get an urge to catch some fish, but I suspect that Endlers follow boyle's law.

[L number Banana]

I'll put as many as I can catch into the 90 next time I get an urge to catch some fish, but I suspect that Endlers follow boyle's law.

If those 50 go into another tank like a 90, you may end up with 900 babies! My sailfin mollies followed no laws and showed me that every 28 days there were 50 more. I don't think it would have mattered if I kept them in a teacup or a public aquarium

Do you have a friendly fish store nearby? They may be able to help you out.

[AlaskanCorydoras]

Oh, the bows ought to keep the Endler's honest. I know a tank full of tetras will. . .