Fry gone

[jstlstn]

So I did a water change on some of my tanks. One of which was a 10 gal grow out with probably 50 dragon-bloods,labs, and Birchardi fry. 5 min later I have 13 fry. Not sure what happened this it the only one that tanked. Lesson no massive water changes on fry tanks only use Seachem for treatments for me from know one. These are the only two things I can think of that would have affect one tank not the others and so quickly. Anybody with any other ideas please chime in. Water out of my tap is well within parameters.

 

[thedavidzoo]

In my experience, fry did not do well with large water changes.

 

[sushiballs777]

man Phil, sorry to hear that bud

 

[chriscoli]

So sorry! I've had mysterious fry losses before, but assumed that It was a very sudden change in water parameters or temperature (I was having a issue for a while where the tap water would suddenly go scalding hot...not good). They usually got the spins before dropping.

That being said, I regularly do large waterchanges without problem.

 

[dogofwar]

50 fish - even fry - in a 10g is a lot and wastes can build up quick. Maybe the large water change shocked them?

Matt

 

[chriscoli]

I was thinking the same thing, too, when I had let a fry tank go too long and suffered losses. I was wondering if maybe the pH had dropped and when I did the water change, they couldn't handle the extreme change.

 

[dogofwar]

Yes - and when fry grow into juvies, the bio load goes way up.

As safeguards, those kinds of tanks are perfect for a sprig or 3 of Pothos (and a chunk of Polyfilter).

Matt

I was thinking the same thing, too, when I had let a fry tank go too long and suffered losses. I was wondering if maybe the pH had dropped and when I did the water change, they couldn't handle the extreme change.