10000L Coral reef at The Maritime Museum & Aquarium Sweden

Discussion in 'Large Aquariums 180g+' started by Sallstrom, Oct 9, 2017.

  1. Sallstrom

    Sallstrom Active Member

    Joined:
    Mar 14, 2017
    Messages:
    108
    Likes Received:
    222
    Location:
    Gothenburg
    Hi everyone :)

    Since I don't have any aquarium at home anymore I will write some about a reef tank at my work. I works as a marine biologist at Sjöfartsmuseet Akvariet, or The Maritime Museum & Aquarium in English, in Gothenburg Sweden. We are a small non profit public aquarium/museum. I am the curator of some of our tropical exhibits, the coral nerd to be more exact :)

    Background

    The tank was built in 1986 in concrete covered in plastic/epoxi with a large laminated glas window. The tank is 3,5m x 1,5m x 1,8m (lenght x width x depth).

    When I started working at the Aquarium in 2009 the tank was a freshwater habitat with Swedish fish. Later we cleaned out the tank and built a background in plastic/epoxi. Not the best background, it was our first try, but it was cheaper than buying artificial rock. For two years we experimented with keeping swedish kelp in the tank, with mixed result(corals are much easier). After that experiment we decided to have a go on tropical corals. At this time we had a number of smaller reef tanks and a coral propagation setup behind the scenes and all theese tanks where getting crowded. And just like the kelp project, this reef tank would be a pilot study before we go into our coming rebuild of the whole Aquarium. We will close down the Aquarium in august 2018 and reopen in 2021. Our hopes is to have a really large reef tank when we open up the new Aquarium.

    So that’s where we were in may of 2014. An empty 10000L tank with some lights and pumps left over from the kelp project.

    The startup

    We had five days from empting the tank until starting filling it up again with new saltwater. During theese days we started to scape with dry live rock. Since live rocks are expensive we were not able to cover all of the background from the start. Our thoughts was to get some rocks hanging on the background, with some help from PVC-pipes, and then get coralline algae to cover the rest of the background. It didn’t work out so well since we also added a bunch of sea urchins later and they keep the background nice and clean. So we’ve been adding more rocks whenever our budget allowed us to buy more.

    We also attached two dry coral flatbed with PVC and covered the PVC with reef concrete.

    We started to cure some of the dry live rock in freshwater, lowered the pH with CO2 and so on, but that was a bit too time consuming. So we decided to take care of the possible phosphate problem later instead. We used about 150kg of dry live rock from the start, and then we have been adding more. My guess is that it’s about 250kg rocks in the tank now.

    On the bottom in front of the background we did a little wall of reef foam to get the sand to stay where we wanted. It’s about 150kg coral sand in the tank and the sand is only in front of the window where you can see the bottom.

    We mixed reverse osmosis water with salt(Red Sea salt and Reef Crystal) in a mixing tank, 3000 liters at the time. Then pumped the mixed water to the tank. The idea was to get the old sand pressure filter running as soon as possible, and hopefully get some bacteria from the old sand we reused(silica sand). It took us five days to fill the tank because of our small reverse osmosis unit.. :)
    Background 1.png
    My colleague Jörgen who was working with me 2014.

    Background 2.png
    I reuse some slides from a talk I did this spring :)
    LSS startup.png

    The system at startup 2014:
    We started the tank with almost the same technique as was used to the kelp project. Return pump is a pool pump at 6500L/h. A small sand pressure filter at 6500L/h. Two Tunze Masterstream for circulation(2 x 150000L/h). A KorallenZucht skimmer (L) and a calcium reactor from Schuran. The sump is a plastic box with the volume of 500 liters. Heaters are two 500W Titan heaters controlled by GHL profilux aquarium computers.

    And since I like to have macroalgae somewhere in a reef tank system we connected a 500L tank as a refugium/algae filter.

    The system today:
    We have upgraded the calcium reactor to a Deltec 1370. We have 2 extra Jebao RW20 in the tank for extra movement in the surface. We also have connected our coral propagation systems, 800 and 1000 liters, to this system. And some cuttlefish tanks as well. We breed Sepia bandensis. So it's a lot in one system :) Yes, and we put in an extra skimmer. And a lot more light, but I will come to that later.
    LSS today.jpg



    Here are some numbers! :D

    Equipment list and tank volumes:

    Aquarium

    Display 10000L

    Sump 500L

    Propagation tanks 800L & 1000L

    Cuttlefish tanks 500L

    Algae refugium 200L

    Skimmers: 1 Deltec SC3070 and 1 Korallenzucht L

    Calciumreactor Deltec 1370

    Flow in display

    Tunze Masterstream 150 x 2

    Jebao RW20 x 2

    Returnpump

    Aqua medic poolpump - 7000L/h

    Sand pressure filter – display tank 7000L/h

    Controller

    Profilux GHL aquarium computer

    Phosphate reactor - Deltec 40L

    Display lights

    3 x 1000W Metal halide – BLV 14000K

    2 x 400W Metal halide – Reeflux 14000K

    3 x 150W Ceramic metal halide – Solljus

    1 x 600W LED – Heliospectra LX602
    Lights .jpg

    Okey. That was some kind of an introduction. A lot of boring numbers and filters. Now I will go trough some old pics and share the progression of the tank, from may 2014 until today! Stay tuned :)

    / David
     
    Tek, Dnoob, Elder1945 and 8 others like this.
    Tags:

  2. Sallstrom

    Sallstrom Active Member

    Joined:
    Mar 14, 2017
    Messages:
    108
    Likes Received:
    222
    Location:
    Gothenburg
    Okey! Here comes pictures from the start up until now :)

    1.jpg
    Like a moon landscape :)
    2.jpg Here we got some sand and some test corals in! And some beautiful diatom algae :D

    3.jpgSome more corals and some fish. I will post some more about the fish later.

    4.jpg
    Less diatoms, more corals :)
    5.jpg
    We got tired of seeing the white background so we filled up with more dry live rock.

    6.jpg

    7.jpg
    At this point I mostly drink coffee and watch the corals grow.. ;)

    8.jpg
    More coffee

    9.jpg

    The BTA is speading...

    10.jpg
    Okey. That was all the pictures up to may 2017. Now I will search for some more newer pictures from some other angles.

    / David
     
    Dnoob, halcyonscapes, TbyZ and 4 others like this.
  3. ksed

    ksed Well-Known Member

    Joined:
    Jan 9, 2010
    Messages:
    521
    Likes Received:
    170
    Location:
    Toronto
    Beautiful David!
     
    Sallstrom likes this.
  4. Sallstrom

    Sallstrom Active Member

    Joined:
    Mar 14, 2017
    Messages:
    108
    Likes Received:
    222
    Location:
    Gothenburg
    Here comes some more :)

    IMG_3847.JPG Snapseed.jpeg IMG_3718.JPG IMG_20170814_150031.jpg IMG_3780.JPG

    IMG_3855.JPG
     
    Flippers4pups, TbyZ, najer and 2 others like this.
  5. Mohammad D. ALMUTAIRI

    Mohammad D. ALMUTAIRI Member

    Joined:
    Aug 25, 2017
    Messages:
    56
    Likes Received:
    76
    Location:
    Kuwait
    great work
    wish to see more progress work of the tank.

    good job man wish you the best with it
     
    679x and Sallstrom like this.
  6. gregkn73

    gregkn73 Member

    Joined:
    Jul 27, 2016
    Messages:
    39
    Likes Received:
    23
    Awesome
     
    Sallstrom likes this.
  7. Sallstrom

    Sallstrom Active Member

    Joined:
    Mar 14, 2017
    Messages:
    108
    Likes Received:
    222
    Location:
    Gothenburg
    Thanks for the kind words! Here are a couple more pictures:)

    Snapseed.jpeg Snapseed.jpeg Snapseed.jpeg Snapseed.jpeg

    / David
     
    Dnoob, halcyonscapes, TbyZ and 4 others like this.
  8. Sallstrom

    Sallstrom Active Member

    Joined:
    Mar 14, 2017
    Messages:
    108
    Likes Received:
    222
    Location:
    Gothenburg
    Todays redings :)
    NO3 - 2 ppm
    PO4 - 0,03 ppm
    KH - 8,3 dKH
    Sal - 34,7 ppt
    Temp - 26-26,2 C
    pH - 7,9-8,1

    And it's time to send in another ICP test today!

    We usually send in ICP test 6-8 times a year. The calcium reactor does most of the job keeping the parameters right, but sometimes we need to fill up some extra B, K, Sr etc. We dose Mn, Zn and Iodine everyday with dosingpumps.

    Since we have an old sand pressure filter running on this system we need to backwash the filter 2 times a week. Therefore we need to replace some water since the backwash water isn't someting we want to reuse(we use LaCl sometimes to get the PO4 down, and this is filtered out by the sand filter). So with the backwashing it is about 7 % water change every month. We don't do any water changes more than that.
    The media in the sand pressure filter is silica sand. We did have quite high Si the first 2 month but since then it's down to setpoint(Triton labs setpoint). We have discovered that if the silicia sand is in an anaerob water it will leak some Si, but if it's not it doesn't leak(or at least doesn't leak more then the organisms in the tank is taking up). We discovered this after we put the pump to another sand filter in the wrong socket and the pump was off every night :D

    Have a great weekend!



    / David
     
    Tek, Sterlingg, TbyZ and 1 other person like this.
  9. Sallstrom

    Sallstrom Active Member

    Joined:
    Mar 14, 2017
    Messages:
    108
    Likes Received:
    222
    Location:
    Gothenburg
    Having a glas of wine after hours at the Aquarium. Have a nice weekend! :)

    IMG_3923.JPG
     
    Tek, Sterlingg, TbyZ and 2 others like this.
  10. JMMJ13902

    JMMJ13902 Valuable Member

    Joined:
    Mar 21, 2012
    Messages:
    1,171
    Likes Received:
    367
    Location:
    Wichita, KS
    Wow, what a great work you guys have done. Hats off to all the marine biologists for spending their time and efforts doing research for good cause.

    Thanks for sharing your beauty with us.
     
  11. Sallstrom

    Sallstrom Active Member

    Joined:
    Mar 14, 2017
    Messages:
    108
    Likes Received:
    222
    Location:
    Gothenburg
    Thank you!
    Glad to share our experiences and very glad to learn more from great forums like this :)
    / David
     
    johntdaballa likes this.
  12. johntdaballa

    johntdaballa Active Member

    Joined:
    Apr 17, 2016
    Messages:
    141
    Likes Received:
    129
    Location:
    HOUSTON, TX
    Stunning tank, love the rock work shelving on the walls worked out great! Definitely following along for more updates
     
    Sallstrom likes this.
  13. Zack33

    Zack33 Member

    Joined:
    Oct 4, 2015
    Messages:
    52
    Likes Received:
    28
    Nice!
     
    Sallstrom likes this.
  14. Sallstrom

    Sallstrom Active Member

    Joined:
    Mar 14, 2017
    Messages:
    108
    Likes Received:
    222
    Location:
    Gothenburg
    Thank you! Let me know if there is any more info you are interested in. I worked with the tank since the start so I'm probably "home blind" as we say in Sweden :)

    / David
     
    johntdaballa likes this.
  15. Sallstrom

    Sallstrom Active Member

    Joined:
    Mar 14, 2017
    Messages:
    108
    Likes Received:
    222
    Location:
    Gothenburg
    Here are some pictures from this morning :)

    IMG_3936.JPG IMG_3935.JPG IMG_3938.JPG IMG_3944.JPG IMG_3948.JPG

    The new favourites on the last pictures. We added two Yellow Spotted Filefish 6 month ago.
    No, special diet added for them. They are allowed to eat coral polyps :)

    /David
     
    Tek, TbyZ, EleMental and 3 others like this.
  16. najer

    najer Valuable Member

    Joined:
    Jul 9, 2016
    Messages:
    1,298
    Likes Received:
    1,364
    Location:
    England Earth
    Great work, loving this. :)
     
    Sallstrom likes this.
  17. EleMental

    EleMental Member

    Joined:
    Sep 14, 2017
    Messages:
    65
    Likes Received:
    112
    This is dreamy! Thank you for sharing
     
    Sallstrom likes this.
  18. gregkn73

    gregkn73 Member

    Joined:
    Jul 27, 2016
    Messages:
    39
    Likes Received:
    23
    David if my math are ok , for circulation you have less than X10 total lt and for lighting less than 0.5 W/Lt, when what people being advised for sps keeping, is for x50 total lt for circulation, and >1w/Lt if no leds are being used......but yours are thriving!!!! Any comments about those common advices that you didn't follow, but your sps are more than happy, will be very interesting :)
     
  19. Sallstrom

    Sallstrom Active Member

    Joined:
    Mar 14, 2017
    Messages:
    108
    Likes Received:
    222
    Location:
    Gothenburg
    Sure, there are some things in this system that doesn't follow the common "rules". I can write about three of them now :)

    Flow - I use my eyes rather then count l/h :)
    In this tank it's different zones of light and flow. At the surface there is a lot of light(PAR at 600) and a lot of flow. Halfway down it's als0 pretty much light(PAR 250-450) and a lot of flow(the two large streampumps sits at this depth). At the bottom there is lower light(PAR 100-200) and lower flow. I my opinion light and flow needs to be adjusted to fit together. That is why we put two extra Jebao Streampumps close to the surface where we thought the flow were to low compared to the light.
    Also maybe 1/4 of the tank water is behind the background. In this area the flow is low. Our sand filter outlet is into this area, but no other circulation. I guess this area is some kind of cryptic zone, but we don't have any possibility to see into that area so I don't know :)

    Light - Me meassure PAR and try to get enough PAR all the way down to the bottom to grow stony corals. Right now they do grow, even if the growth is a lot better closer to the surface then near the bottom. I'm not totally happy with our lights, but lights are expensive(eg LED) and our budget is not that big :) I will post our latest PAR readings as soon as I find them.

    Turn around rate/return pump - It's only about 6000 l/h from the sump to the tank. Why is that? Well, we used a pump we had instead of buying a new one. That is also a "rule" I think is overrated that you need X liter/h turn around rate, sump - tank.

    This tank wasn't built to host a coral reef from the beginning, we had to adapt things to get it to work. And we have taken some chances along the way and we have had luck so far :)

    / David
     
  20. Sallstrom

    Sallstrom Active Member

    Joined:
    Mar 14, 2017
    Messages:
    108
    Likes Received:
    222
    Location:
    Gothenburg
    Here are some PAR readings from April this year. It's the same light setup as now. The PAR is meassured with a Apogee MQ-200 PAR-meter, so it's just approximate numbers. The readings on the picture is taken at the corals/rocks, not out in the water coloumn(if you understand what I mean? :) )
    PAR april 2017.jpg
     
    najer and TbyZ like this.
Draft saved Draft deleted

Share This Page

Loading...