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It is important that we as a community are responsible as hobbyists. Recent threats include the white spot virus that has been found in prawns in Queensland and the possibility that the crayfish plague has been introduced to our country via exotic crays from North America that might host this fungus and that have immunity to it. For example entire crayfish populations in Europe have been decimated by this disease because only the North American crays have immunity.

It is well known that many in Australia keep and breed exotic shrimps and other creatures and in most cases this is not problematic but there are exceptions and so it is necessary that we have a handy resource on the forum that discusses this topic and provides relevant links. Australia has very strict quarantine laws; although we are allowed to keep and breed a number of different shrimps in Australia the importation of shrimp species not in the "suitable specimens for import" is extremely illegal and if you are caught you will almost certainly be handed a jail sentence.

Local fish shops will often freely take any unwanted animals (even sick ones) and there are always plenty of other hobbyists who will jump at the chance to take them as well.

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Keeping Macrobrachium in Aquariums
The macrobrachium group of shrimp are characterised by the extreme enlargement of the second pair of pereiopods especially prominent in the males.

They will tolerate a wide range of conditions as they are found in water from salty to full fresh but the variants I currently have seem to prefer a more neutral environment ph around 7, Gh 2-3, tds around 100 for fresh water variants temperature can vary greatly as well. Over summer they survived in tanks above 28 degrees for 2 weeks straight. The first Australinese were caught in water that was about 10 degrees, but they seem to prefer it from 20 to 28 degrees. Their natural environment should be considered, as the tropical guys will like warmer water than guys from the south. There are also brackish and salt water variants to be explored at a later date.

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Recently I bought a couple of Sötching oxydators from NewBreed Aquatics closing down sale, As I've been wanting one for awhile but didn't quite have to cash to fork out.

These sold for $15ea at like 40% off.

Shipping was really fast, and they arrived well packed in perfect order.



The box comes with:

1x glass bottle with plastic lid

1x ceramic holster

2x Catylyst

2x 82.5ml bottles food grade H202 (4.9%) oxydator solution.

Instruction manual. 


Basic instruction:

fill glass bottle with H202 to within a few cm of the top.

Add catalyst. 1 for <30L, 2 for 30-60L.

Plug the cap back on carefully but tight, before inserting the bottle into the ceramic holster and placing in your aquarium.

Choose the appropriate concentration of H202 for your application, and add the correct number of catylysts, by doing this you can tailor the oxygen production in your aquarium, For example:

In my 40L tank I'm using straight 4.9% solution and 2 catalysts.

Where as in my 10L nano I'm using 2.45% and only 1 catalyst, (diluted equal parts with distilled water)

Store any spare catalysts somewhere safe so they don't get lost.

As advertised, the sotching oxydator produces oxygen aswell as an "activated oxygen" which apparently has a lot to do with neutrient and micro neutrient bioavailability in plants. They are also said to reduce algaes esp blue green algae and green spot. 

Bubbling away peacefully in my tanks. :) they are lovely to watch when my Bazooka isn't running hehe.


So whether you want to increase oxygen levels in a planted tank without increasing surface agitation (which outgasses precious co2), Increase DO levels to improve shrimplet or fry survival rates, Run a quite tank without a filter for example on your bedside table where an aquarium or scape would add a sense of peace and nature without loud bubbling or humming of filters that can be annoying, Help battle algaes or even just improve general fish and shrimp health this product does it all reliably.

All in all, its clever German engineering combined with a sleek, sexy in tank look earns this product a full 5 stars from me.

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Here are a few pics I took recently of the Corydoras fry I have in the fishroom currently.

It's interesting to compare the size of fry at hatching. It has no correlation to adult fish size. Generally speaking long nose corys have smaller eggs.
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So a sneaky preview from my new biotope tank for keeping zebras.
Here is a video of them munching on some Boss Aquaria snow.
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Hello, I've been breeding different shrimp for a year or so and last month upgraded to some native zebras :) they are just so nice looking I couldn't resist, so I have a colony of 23, just in a tank with crushed black Quartz gravel a small piece of wood with plants and heaps of floating plants and such.

the ph of tap water here is well over 8 so I'm using raintank water from a large 2-3000L plastic tank out the back. Parameters are:

Tds 70ppm (forgot to write the most important part lol)

ph 7.7

gh 53ppm

kh 17ppm or less

0 nitrite 

and it's a slight tanin color.

ive set up 2x 20L tanks with cycled filter media, sponge filters and "kaito" aqua soil a few weeks back, just using the rainwater.

Now the tanks have a ph of 5.1 and basically same everything else, 0 nitrite.

So is this good parameters for breeding zebras?

If so, how long should I take to acclimate them to the softer water, like a few hours or days? 

When I put rainwater in (7.7) for water changes the ph swings to about 6 for a day or so which I don't think is good, but there's nothing in the tanks yet and I change most of the water trying to combat the even more rapid buffering effect the aqua soil has in the first few weeks. 

i usually drip half a bucket in through the hob filter over a few hours in the tank they are in right now.(40L tank) And I've added alder cones to start lowering the ph a bit getting ready for the switch.

any advice to making these guys happy would be appreciated. :)


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I've been keeping a close watch on the new features that are being added to the next release of the forum software. There are going to be some great changes that are on the way and I'll use this topic to index them all.
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