Fry dieing - Any advice please

[Mo99]

Hi I’ve got a query, I have been successful in saving fry recently due to me buying a breeder box. anyway way I have 3 batches of guppy fry ,
1st batch (9 only)-6 weeks old (3 left i guess)
2nd batch (11) 2-3weeks old.
3rd batch (30 odd) 7-10 days old.

1 & 2 batch are in a net breeder, while 3 batch are in the plastic breeder.

I have not lost a single fry since they where born except if the mother/other fishes
eat any during birth.(1st batch was a rescue job)
a few days ago 1 of the 1st batch fry died
the day after another one was dead ( 1 st batch) . 2 days went by no loss.
today I now find 5 (1st batch) fry dead.

When I find them dead , its always in the morning , lying at the bottom of the tank.
I just don't understand it , all of them where ok, non of the 3rd batch fry have died, even though some where born pre-mature, with-in a day they where all swimming at the top.
So why is this happening to the 1st batch even though they are older bigger, and fast swimmers. their cage is a net one, so more water , oxygen etc. than say the plastic box. (just for arguments sake). 1 thing though , a week a ago I moved them into a new net breeder. same size and all but just cleaner than the one they where in ...
Its getting a bit hot in the UK , temp even with the heater switched off it is still around 81 deg.
This is very weird , if I was to lose any then it should of been the 3rd b. fry, or the 2nd , after all the 1st batch have been around long enough than the 2nds or 3rd..


Nitrite=0
Nitrate=50
Ammonia=0
Ph=7.2
GH=10 (a bit high I know)

 

[Crookster]

Do you leave the heater off overnight? The temp could be dropping overnight.
Also what do you feed them?

 

[Mo99]

Sorry , forgot to mention that the heater is actually on, but the termostst keeps it switched off in the day and i guess switches back on at night, as i had a look last night at 2.40ish (was out after england lost in the football, damn), and it had a similar reading , the termostat switches on and off. Its only a 2-3 weeks since we started getting warmer weather here. But i can say that the temp. doesn't fluctuate much apart from 1 deg.
I inistailly feed them interpets liquidfry no 2 (livebearers) and now (well since they where a few days old) interpets fry food no 3 (crushed flakes).

The odd thing is that all 3 batches of fry get teh same food , same water etc. so how come mostly the 1st batch fry are dieing , i have lost 1-2 from the 2nd batch though.

 

[coequi]

Nitrates are getting a bit high. How often do you do a water change? Could be you need to do a 30% to 50% water change. I try to do a 50% once a week and the nitrates stay around 8 - 10 PPM.

 

[Mo99]

Nitrates are getting a bit high. How often do you do a water change? Could be you need to do a 30% to 50% water change. I try to do a 50% once a week and the nitrates stay around 8 - 10 PPM.

Hi,
Sorry been away on holiday, sorry coequi, you didn't read my message. nitrate is at 50 (thats not ppm but rather what shows up on the test strips). at source (tap) . Anyway its been almost a month since i last replied, coequi you missed the boat on that one. With help from Tuestenback, and the other i can say pretty much that is was the warm weather. (not the heater) . Now that teh weathers a lot cooler, i 'haven't lost any more, though there are not any 1st batch fry left also 2nd batch same 1 or 2 .

Thanks for you help guys....

3rd batch are doing just fine. currently cycleing a 5 gallion tank for these new guys to live in.


Mo.