Bronze Coydoras & CPD’s

[ferreter]

Is it possible that Bronze cory’s may kill my little fella’s?
I’ve got 4 cory’s, 3 guppies and 8 CPD’s/Zebra Rasboras in a heavily planted 100l but I can only see 2 happily chasing each other around and haven’t seen any more in over 24hrs not even at feeding time.

[Tom2006]

I would be very very surprised. How small are the cpds? They are masters of hiding.

[BallAquatics]

So would I… I think the key here is “heavily planted”

Dennis

[ferreter]

Well its definately heavily planted and it wasn’t the cory’s its the nitrite spike I mentioned in t’other post they ain’t dead yet but only 2 of them seem untouched by the problems. I’ve got the nasties right down with latest test so I’m hoping they’ll perk up…
I’ve been a silly boy again!!!!!!!!!!!!!!

[Tom2006]

So are they all still alive or do you think only two have made it? Sorry to hear if its the latter. :cry:

[ferreter]

Well I lost 2 so I still have 8 CPD’s/zebra’s (think only 2 zebra), the spikes are settling since I added a 2nd filter my ammonia is trace and nitrIte is less than 0.25mg/l with a 10% change everyday so I’m still giving myself a daily kick in the shin so that I may learn.
The Danio’s are very outgoing & cory’s are laying eggs all over the place so maybe they like really poor water??? :wink:

[Tom2006]

CPDS are quite sensitive fish. They like stable mature water, no spikes. Now everything has settled I’m sure they will be breeding in no time!

[ferreter]

BREEDING?? Just trying to keep them alive for the mo’, I added an extra filter to speed things up so now there’s a Fluval 2+ and a sicce shark both turning over 400lph. The plants are growing wild & this mornings test revealed 0 ammonia, 0-possible trace of nitrIte and nitrAte was 0-5ppm.

I’ll give it a few more days then I’ll start clipping away some plants but for the minute they’re helping me out too much to worry about the aesthetics of the tank

[Tom2006]

you’ll be surprised. Once settled they soon get on with spawning…and then eating all the eggs and fry! :lol:

[m.clausen]

@Tom2006 wrote:

you’ll be surprised. Once settled they soon get on with spawning…and then eating all the eggs and fry! :lol:

not to really hijack the thread…but doesnt it seem counter productive that CPDs eat their own eggs/fry?

[Tom2006]

it certainly does but you tell them that! :lol: I’ve found in very heavily planted tanks fry do survive but only a few. You sadly need to remove the adults/or eggs once spawning has taken place to get any reasonable numbers of fry. The good thing is they are VERY easy to spawn

[RescuePenguin]

Ferreter, try reducing the water changes. I also breed corys and noticed that frequent water changes cause spikes. I would do the changes every 2-3 days. That will give the bacteria in the filters a chance to multiply faster. I too like to use 2-3 filters in my tanks, but I use home made sponge filters unless there is a reason to use another type.

M. clausen – It may sound strange but have a look at their natural habitat. Their food sources come and go, if they eat their own eggs and fry it gives the parents a food source for the times when they don’t have any. In the wild enough fry grow up to keep the species going, it seams like a workable system to me.

[Author]

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