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Sewellia breeding with or without snails
October 11, 2015
12:25 pm
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kim m
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Hi all.

Having sporadic luck breeding S. linolata and sp. Spotted I am considering to scale up with a few more species.

I have heard it's a good idea to have a snail-free tank as snails supposedly eat Sewellia eggs. I have had fry in tanks with snails but maybe some people with more experience with Sewellia could enlighten me a bit more.

How about shrimp (small Caridina/Neocaridine) ...would they possibly have a (negative) effect?

---------------------------- Best regards, Kim Kastberg
October 11, 2015
4:25 pm
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mikev
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Shrimp would be far more dangerous than snails.

(I have snails in both lineolata and spotted tanks and they do not appear to have any negative effect).

October 11, 2015
7:26 pm
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kim m
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Thanks Mike.

It is also easier to keep a tank shrimp-free rarther than snail-free :)

---------------------------- Best regards, Kim Kastberg
October 12, 2015
12:11 am
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torso
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Hi Kim

I tried different setups with groups of 8-12 adults.

Without snails and a thick layer of coarse gravel - gives the best results. I stopped this setup. See below.

With snails: important is a thick layer of coarse gravel - up to 15 mm diameter. Larger snails can't enter the substrate, young Planorbarius corneus and Melanoides tuberculatus do. Up to 100-200 specimen in half a year (S. speciosa and S. sp SEW 02 are less productive).

With snails and sand: some offspring always turns up

With snails and shrimps: best result with coarse gravel, with sand still some offspring.

With Hyalella azteca (accidentelly), snails and shrimps: some offspring. Lowest rate of all setups

Best setup seems to be (didn't try yet): a thick layer of coarse expanded clay and aspirating every week. As they can easily produce 400-500 eggs per month and given, that S. lineolata and S. sp. spotted are hard to stop once they started to spawn, that leads to a shedload of youngsters. The guys in Germany, who tried it back in 2009 soon stopped the trial.

I use shrimps to bring down the rate, because to sell offspring in great quantities is not worth the effort as they need about a year to reach a selling size of 4 cm.

Cheers Charles

October 12, 2015
7:25 pm
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kim m
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Great input Charles! Thanks :)

Hopefully I am picking up S. marmorata and sp. Spotted tomorrow.

They are going into some mixed tanks while I set up their species tanks.

---------------------------- Best regards, Kim Kastberg
October 15, 2015
8:11 pm
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kim m
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So, visiting a couple of shops this week yielded some S. marmorata, sp. spotted and some imported as S. breviventralis but turned out to be SEW02/03 (need a closer look) and SEW04.

Quite pleased :)

---------------------------- Best regards, Kim Kastberg
October 15, 2015
8:28 pm
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mikev
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S. breviventralis name has been used for more than five years now to denote a mix of Sew0203 and Sew04.

The difference between Sew02 and Sew03 is not to be understood by mere mortals, it belongs to the faith domain. 😛

October 15, 2015
9:16 pm
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kim m
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Thanks for enlightenment Mike :)

Until recently, not many Sewellia except lineolata and sp. spotted has been available here so I haven't followed it too closely.

---------------------------- Best regards, Kim Kastberg
October 16, 2015
6:33 am
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mikev
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Pleasure. Hope you manage to breed some of the new ones.

One thing realized: hopefully you are not putting them into the same tank. Some are more aggressive than others and may kill other species.... s.lineolata in particular is a bad one.

October 16, 2015
8:24 am
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kim m
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They are in seperate tanks :)

Both to avoid agression and to avoid cross-breeding. I don't know how eager they would be to cross-breed, but I don't take chances.

I will post some pics once I get the lighting in my rack fixed. Rebuild my room over the summer and it need the "finishing touch" so to speak :)

---------------------------- Best regards, Kim Kastberg
October 16, 2015
10:51 pm
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kim m
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So, dug up some old LED lights. Still, the glass is dirty and so on, but it gives an idea. This tank contains S. lineolata.

The gravel is from a stream at my parents' farm.

unnamed.jpgImage Enlarger

---------------------------- Best regards, Kim Kastberg
October 17, 2015
1:07 am
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Matt
Málaga, Spain
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mikev said
The difference between Sew02 and Sew03 is not to be understood by mere mortals, it belongs to the faith domain. 😛

Think they were separated by distance between pelvic and anal fins (a clear separation in SEW02, none in SEW03). Remain unconvinced by that and all could be S. breviventralis.

Cake or death?
October 17, 2015
3:17 am
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mikev
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There was a discussion somewhere that S. breviventralis may be Sew04. (No point to look for a link, this was a speculation).

Actually, you reminded me of an item on to-do list... I should show you my alleged S.elongata photos ... they finally grew up enough to make me think of Sew05. 😛

October 17, 2015
6:35 am
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kim m
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SEW05? How does that one look?

I am wondering what species are found in imports on a regular basis? How about a species like pterolineata?

Any comments on my set-up above? I think it seems to work OK for the fish.

---------------------------- Best regards, Kim Kastberg
October 17, 2015
8:10 pm
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torso
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That will do, Kim.

I my tanks, the waterflow is directed from the right/left corner backside to the front glass. A flat large stone in front - like the one at left - placed in the backflow from the front glass helps the spawning pair to swim up once they cling together. Eggs drive away and fall into the coarse gravel.

Cheers Charles

October 18, 2015
7:10 am
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kim m
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Thanks Charles!

Can anyone confirm that the Sewellia on page 5-6 in the link below seem correct? If so, I might have S. analis also...

http://www.aquariumphoto.dk/in.....5#category

---------------------------- Best regards, Kim Kastberg
October 18, 2015
11:18 am
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kim m
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Can answer that myself now. Johnny (site owner) had them IDed by Joerg Freyhof.

---------------------------- Best regards, Kim Kastberg
October 18, 2015
12:49 pm
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torso
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and I doubt it, Kim.

Cheers Charles

October 18, 2015
2:38 pm
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mikev
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kim m said

Can answer that myself now. Johnny (site owner) had them IDed by Joerg Freyhof.

kim m said

Thanks Charles!
Can anyone confirm that the Sewellia on page 5-6 in the link below seem correct? If so, I might have S. analis also...
http://www.aquariumphoto.dk/in.....5#category

I think some s.lineolata photos are correct. so are some Sew01. as for the rest .... :(

October 18, 2015
7:24 pm
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kim m
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Thank you both for input! Will do photos of all types tomorrow :)

---------------------------- Best regards, Kim Kastberg
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