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Bully fry!


BigBossPants

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How exciting :) my bully eggs have hatched and I now have a swarm of 2mm fry in the breeding tank! They are so cute zipping around in their fish-cloud. I still have not decided how or whether to transfer them to salt, I think I will do half in fresh and half in salt and see what happens. Now to try and do a water change without sucking up the little guys!

Daddy bully has been named Randy, as he is preparing for his 3rd batch of eggs lol.

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Haha yeah a bit small yet, all I can really see are their eyes glowing. I will try and get pics but not sure if I can upload, using my mobile for the net atm. They are about 24 hours old now, I can still see their yolk sac if I look closely. Did a small water change using airline with an air stone as a strainer lol. Took a while but no sucked up babies!

Yes I read the paper, maybe I skimmed past the part about salinity :S Ill have to read again. Did a bit of research on the lake tarawera population, apparently the upper tarawera river bullies are non diadromous, but the lower river ones are... I wonder if this applies to the ones in the lake also?

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I wonder how pet stores are allowed to sell them? Confusing.

I have the fry in a 10-12l tank with a mature sponge filter, doing daily partial water changes. Feeding 3x daily.

I have those little tanks that I borrowed from you mark, going to spread them over the 3 tanks as they grow

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Mahurangi tech breeds them, went through a PILE of legal stuff and the offspring of the bred fish are sold.

I remain dubious. The requirements of spawning adults, larvae and fry of diadromous species, especially galaxiids, are pretty specialised.

I know they were doing hormone-injection stuff with eels, but the larvae kept dying at 14 days.

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Cheers for the suggestions :) tested the water today and it showed low levels of nitrite and a pH of 8. Im thinking there may have been an ammonia spike a few days ago and the high pH made it more toxic. The next batch have been laid on driftwood so that should address that. Bigger water changes combined with using parents water should hopefully keep any wastes at bay.

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You said you were using a mature sponge filter. How was it matured? Possibly there was more bacteria in the sponge filter than was being fed by the tank processes. They could have died and added to the spike.

You said you were feeding liquifry and green water. It is unlikely that they would be herbivorous. Not sure what is in the liquifry. In the wild they are zooplanktivorous. What did they feed them in the inanga paper? I imagine rotifers and similar.

This may sound like a really stupid question but has to be asked... I assume you are using proper marine salt for making up water for marine tanks, not any other sort of salt or 'aquarium salt'?

Can you try rainwater?

Just thinking through the possibilities.

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The sponge was in the filter for my axie tank, had been for many months. That idea seems likely. The liquifry contains 'derivatives of vegetable origin, eggs and egg derivatives, yeasts and preserved with EC additives.' says it will also stimulate infusoria.

Cant afford salt mix so am using sea water collected at high tide from a clean beach away from boats. It sits in a sealed bucket with an airstone to circulate.

Will look at getting rotifers, will they be small enough for them to eat when they are freshly hatched? I also have microworms but didnt have a chance to feed them.

I had waited a week to put any salt in, thought they would cope better with alivuld size on them, might start the salt on day 3 or 4 this time. In your opinion would an increase of 0.002 daily be ok?

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The new batch have been going for just over a week and seem ok :) the parents dont seem that happy about the frequent small water changes though. The fry all hang out in a back corner, most of them clinging to the glass. They appear to be growing. How big do they need to be before they can handle rotifers?

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you could start adding rotifers now, you should be able to observe the fry making small darting movements to catch them

small amount directly into fry group

the colour of their stomachs will change as to what they eat

tetra = green gut, rotifers a browner shade

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