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Still no larvae


Richard

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well... i have left my 2 pails of water outside for almost 2 weeks now... added some yeast... but i still dont see any larvae... there are lots of dead insects in the water though... and lots of black dots in the water... dunno if they are eggs... but no signs of larvae at all... am i doing anything wrong?

also...the water is evaporating quickly... only half full now...should i add water?

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Hi Richard,

Can't see it NOT working after two weeks he he.

I set up two more containers yesterday, and already they are swarming with mozzies.

Did you use old tank water, or straight from the tap ?

The water should be greenish by now in this weather.

The black dots could be egg baskets and may turn into mozzies.

The mozzies swim below the surface at the slightest disturbance, so if you sit quietly you will see them come up for air after about ten seconds.

Yes.... You should keep the pails topped up, but don't add more yeast.

You will get all sorts of dead insects on the surface..... no probs, and No.... you are doing everything right it seems :):)

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I've had the same problem trying to get bugs. I put a bag full of daphnia into my pond and they all seem to have died. In fact, the only bugs I've seen in it are a few mosquito larvae that only appeared in the last few days.

The hygro. polysperma(I think) that I threw in there seems to like it though, it's turning red.

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Well... Mondays weather was really good... the sun was out all day... when I got home from work I noticed the water had turned green... On Tuesday while doing my water changes.... I filled up the tank with my old tank water... since then I have been keeping a close eye... it looked like there were eggs on the surface for the past few days... however... it looked like air bubbles.... so I am not 100% sure.... today...those eggs/ bubbles were gone... but still no sign of larvae... getting quite a colony of dead insects on the surface though... I am just wondering... could it be possible that there were larvae in the pail... just that they were at the bottom and i could not see them? or are they too tiny?

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The larvae and daphnia can be seen with the naked eye. It may be that conditions where you live are not conducive to growing daphnia without a starter culture.

PM me with your address and I'll get some daphnia to you. Or, my son lives in ChCh (St Albans) and is coming up here at the weekend. I could get him to take some back with him for you to pick up if you like.

Our club also hopes to make a club trip to ChCh on Jan 11th. We will put a notice in this forum so anyone in the area is welcome to join us for the day.

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You must live in a Bugless area Richard if you don't have some mossies by now. Even when they change and fly off they leave some behind.

Take a scoop with a net and see if you have any wrigglers in it.

The conditions are perfect by the sound of things.

If all else fails, the green water will feed any fry you might have.

How about trying some brine shrimp.... now thats sure to hatch :)

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Thanks for the offer Caryl... will let u know if i need help... but i think it should work within this week... the water is really green now... and there seems to be some mold/ algae growth...and there really are lots of insects and wings floating in the water dead...even dead mosquitos... so they must lay eggs sometime???

my pails are plastic... so that should not be the problem....

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Hi Richard,

If it's mossie wrigglers your after, just something to be aware of

they need to breathe air from the surface through a tube on their rear, so if you have a lot of scum or slime floating on top they will not survive.

I collect the eggrafts and bring them inside to hatch and the newly hatched wrigglers are really tiny and you won't catch them with a normal net until they grow bigger, so you might have some there they could still just be too small to net yet.

Dianna :wink:

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Folks,

Just a data point. I *never* find mosquito larvae in green water.

Always in clear(ish) old water with some organic content (dead leaves

etc). Usually I get the best results from partially shaded (ie under

trees) containers.

Andrew, with plenty of mossie larvae at the moment.

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My tubs outside are a deep green colour.

Bill... with tons of mossies at the moment :)

Well Richard, you've tried everything else.... don't know what to suggest.

From around 9am my tubs get full sunshine till around 6:30pm.

I have another tub that gets sun from sunrise to around 8:30am.

The latter one hardly gets any mossies in it.

Must admit, when my green water gets a bit thick I tip about half out of the tubs and top up with fresh water, but normally a good downpour does this for me.

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I just went to catch some mosquito larvae out of my pond because I noticed there were a few. And when I was doing it I noticed there are buttloads of daphnia in there. For any of you not up on technical lingo that means somewhere between heaps^2(Heaps&heaps) and bazillions.;)

I think it might be because of what Caryl said, that hers seem to stay in the sunlight. This is the first sunny day in a while and all the other days I've looked have been cloudy days. Maybe when it's cloudy they hide at the bottom of the pond where you can't find them?

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Caryl said...

> On sunny days they are thickly huddled together in the sunny bits...

It's called 'positive phototropism' (which translates as 'moving towards

the light'). Since daphnia swim towards a light source, they tend

to concentrate in parts of the culture container that are better lit.

John1 said...

> ... go out to the supermarket and spend a fortune on moquito

> repellants.

I don't. If the mozzies can sneak a feed off me then they're welcome

to it. Of course, we don't really have much in the way of disease

carrying mosquitoes here. Which is just as well since one of the local

hobbyists had (has?) Malaria a few years back.

Andrew.

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