Swedish fish - behind the scenes rebuilding a public aquarium

[Brew12]

Then we would need these kind of facilities
https://www.tropical-islands.de/en/

Still not seeing the problem!!!

 

[Lasse]

Good - do the hard work I'll see you on Monday. Greatings from Rome.

Sincerely Lasse

 

[Sallstrom]

Good - do the hard work I'll see you on Monday. Greatings from Rome.

Sincerely Lasse

We also do some fun stuff. But that's a secret for now..
See you monday!

 

[GlassMunky]

Today I continued the work trying to get a large Acropora efflorescence out of our 1500L room devider reef. Here's the colony:
View attachment 947109

And here two not so good top down pics from this tank. The corals have created coral islands. So I need to cut them down before it starts growing palm trees in there as well..
View attachment 947111 View attachment 947113
No wonder the flow isn't good in this tank

Today's tool box! Hammer and screwdriver did the trick
View attachment 947115

Here's the colony out of the tank! No wonder we're having a hard time keeping alk, Ca and Mg up. The base is about 10cm in diameter. View attachment 947123

;Wideyed WHOA!!!! that colony is HUGE!!!!! i love efflos so much thats just super cool to see

 

[Lasse]

We also do some fun stuff. But that's a secret for now..
See you monday!
View attachment 947991

Maybe I show up Tuesday - not Monday.

Sincerely Lasse

 

[Dr. Dendrostein]

Good - do the hard work I'll see you on Monday. Greatings from Rome.

Sincerely Lasse

When I was planning to get married 7 years ago me and my wife to be, we're planning wedding, tickets first class to Rome each came out to $14,000 each. After I found that out I said Rome's out of the picture. Bummer

 

[Dr. Dendrostein]

Maybe I show up Tuesday - not Monday.

Sincerely Lasse

ciao, Paisano

 

[Dr. Dendrostein]

We also do some fun stuff. But that's a secret for now..
See you monday!
View attachment 947991

Don't do something, Lasse won't do.

 

[Sallstrom]

Don't do something, Lasse won't do.

We tried to copy the work of Martin Moe. To breed Diadema urchins. But Diadema setosum instead of the Atlantic one.
Today we wanted to see if it was possible to trigger them to release gametes by putting them in warmer and cooler water.
Today's experiment failed Almost an hours "dip", but no reaction. Which seems strange since they spawn in their home tanks every time we do water changes.
Anyway, we will try again. Maybe we need to feed them better, or raise the temp/lower the temp in the dip tanks. Or maybe it's the wrong season (some of our tanks follow the temp outside, now it's winter and a bit cooler in those tanks).

The good news today was a bunch of new born glass shrimps, Palaemonetas varians. They give birth to rather large offspring, but not so many at the time. So no need for larvae tanks, they do fine in a regular tank. Just needs to be separated from the adult due to cannibalism. Usually we buy them and keep them in a cold water system. But then they doesn't seem to reproduce in water under 15 degrees. Now we've tested to put them in both 20 and 25 degrees, and they've started to reproduce
Glass shrimps are great live food for small cuttlefish and seahorses for example.

 

[Dr. Dendrostein]

We tried to copy the work of Martin Moe. To breed Diadema urchins. But Diadema setosum instead of the Atlantic one.
Today we wanted to see if it was possible to trigger them to release gametes by putting them in warmer and cooler water.
Today's experiment failed Almost an hours "dip", but no reaction. Which seems strange since they spawn in their home tanks every time we do water changes.
Anyway, we will try again. Maybe we need to feed them better, or raise the temp/lower the temp in the dip tanks. Or maybe it's the wrong season (some of our tanks follow the temp outside, now it's winter and a bit cooler in those tanks).
View attachment 948335

The good news today was a bunch of new born glass shrimps, Palaemonetas varians. They give birth to rather large offspring, but not so many at the time. So no need for larvae tanks, they do fine in a regular tank. Just needs to be separated from the adult due to cannibalism. Usually we buy them and keep them in a cold water system. But then they doesn't seem to reproduce in water under 15 degrees. Now we've tested to put them in both 20 and 25 degrees, and they've started to reproduce
Glass shrimps are great live food for small cuttlefish and seahorses for example.

On sea urchins, dont know if comfortable with potassium nitrate to make spawn

 

[Sallstrom]

On sea urchins, dont know if comfortable with potassium nitrate to make spawn

Yes I know some use chemicals to get them going but I haven't done any research on that.
I was totally convinced it would be enough with a quick temp change. So I'm a bit surprised. But solving problems if fun!
We will do some more tests. We've move 6 urchins into our work station tanks, so they are easy to feed, monitor and move. Hopefully we'll find a way without using chemicals.

 

[Brew12]

Yes I know some use chemicals to get them going but I haven't done any research on that.
I was totally convinced it would be enough with a quick temp change. So I'm a bit surprised. But solving problems if fun!
We will do some more tests. We've move 6 urchins into our work station tanks, so they are easy to feed, monitor and move. Hopefully we'll find a way without using chemicals.

Maybe you should give them a little privacy!

 

[crusso1993]

Maybe you should give them a little privacy!

Or some romantic background music!

 

[Sallstrom]

Maybe you should give them a little privacy!

Hehe.. They are back together now in a cozy tank with the lights off. Maybe I should be at work on watch for some spawning

 

[Sallstrom]

Or some romantic background music!

That we can fix! Now when the museum is closed we've installed a couple of speakers in the exhibition so we can listen to music. But we forgot to put it on during our experiment today! Might have been the thing we missed.

 

[Dr. Dendrostein]

Hehe.. They are back together now in a cozy tank with the lights off. Maybe I should be at work on watch for some spawning

Dinner and a movie should get them in the mood.

 

[Stigigemla]

If You need a second source fot the shrimps try the city pond in central Landskrona. I took lots of them 24 or 25 years ago.
It was in august or september. But if You want to take some I think its best to have a permission. They are an endangered species nowadays.
I thought it was Palaemon adsperus but I was very puzzled by the low salinity in the water. Reed was growing there too.

 

[Sallstrom]

If You need a second source fot the shrimps try the city pond in central Landskrona. I took lots of them 24 or 25 years ago.
It was in august or september. But if You want to take some I think its best to have a permission. They are an endangered species nowadays.
I thought it was Palaemon adsperus but I was very puzzled by the low salinity in the water. Reed was growing there too.

Cool! I was told by a colleague at the natural history museum that there are some small populations in a couple of salt ponds in Bohuslän, near Lysekil on the Swedish west coast. But they didn't say anything about Landskrona. I will tell them next time I meet them!

 

[Sallstrom]

More aquarist job today, more coral colonies moved from the 1500L room devider reef!

No water changes since 2014 in this tank. It has worked out well!

 

[Brew12]

More aquarist job today, more coral colonies moved from the 1500L room devider reef!
View attachment 948874 View attachment 948875 View attachment 948876 View attachment 948877

No water changes since 2014 in this tank. It has worked out well!

I love the color transition on that piece! The size of these colonies is mind blowing.