Tag Archives: technique

Alpine newt – Triturus alpestris

In April I had the honor of meeting one of the most rare amphibians and I would venture to say that it must be the first time that anyone has taken photos under water of alpine newt in Denmark in its natural environment. Alpine newt is found only in southern Jutland around Aabenraa and only in ponds that do not get too hot in the summer. Alpine newt live in cold forest ponds and requires shade at the water hole, otherwise it may die of heat stroke. We were round to 7 different ponds in order to obtain the bare roughly term in the water. All the ponds were teeming with salamanders. The newts stayed on the bottom in the deepest part of the pond where the water was coldest.

Alpine newt is the most beautiful of our newt with its blue patterns, screaming orange belly and leopard spotted side. Unfortunately, the brown forest lake water make the colors disappear little, so a single male was captured for pictures in a photo aquarium and set out again. A fascinating encounter when you’ve been searching all day. April is the time when the mountain salamander mating and this is where it is easiest to find in the pond.

Thanks to Allan Høxbroe for the above water photos showing how to work in a small pond and thanks to Uffe Mikkelsen, who showed us around in the forests south of Aabenraa.

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Posted in Ikke kategoriseret, Nature photos, Underwater photos Also tagged , , , |

System overload 2 – update

This is getting weird – I sent a water sample to my local (1 hour away) saltwater aquarium store. He phoned the results:

Kh 15 – which is not that wierd since this is the same as the tap water (lots of calcium)

Nitrates > 25 mg/l !!

Phosphates 0,3-0,5 mg/l !!!! which is really weird since I measured around 0,3 before the water change

My own test-kit (Red Sea algae control test kit) measured nitrates at around 2 mg/l and phosphates almost 0 – so now I am confused, since I just changed 600 liters out of a total of around 800 in the whole system. I ordered a new test-kit for phospates – hope that will give me some direction off where my aquarium is headed.

Today I built my own design of a portable deep-sand bed, using a box for refrigerators from Ikea, some pvc pipping, parts from a gravel bed filter and a piece of  nonwovens (textile for preventing the sand from running out the drain in the bottom). I hope this will help reduce nitrates by denitrification.

Here a schematic of the whole system as it runs now.

Schematic with flow and filtersIkea bow with two drains, seen from the sideTwo drains seen from insideOne drain coveredSand and second drainFinished filter

Posted in Coldwater aquarium Also tagged , , , |

Aquarium final finish

The aquarium is finally done. I have been discussing the frames and hatches a lot with the carpenter and we ended up doing it in aluminium and acrylic plates. The plates are fixed to the wall with velcro glued and nailed to to wall. It think is looks great with a nice minimalistic touch. And most importantly it is easy to access the aquarium. Yesterday the two shark egg hatched so now there are two very small almost white sharks in the tank.

FrontFull tankFull tank from the sideBaby shark

Posted in Coldwater aquarium Also tagged |

Cold saltwater aquarium building 2 – technique

Here´s a short description of the technique involved in setting up the 500 liter tank.

The main tank is 500 liters, from here the water is guided to a 250 liter sump through the overflow. From the sump the water is pumped to a 140 liter aquarium, which was my old freshwater stream aquarium, now functioning as a filter.

Skimmer: DYI “mean midget” rated for 1000-1500 liter, airflow approx 3000 l./h. with a Atman HP8000

Flow in main tank: 1 X 12.000 l./h, 1 X 6000 l./h and 1 X 2600 l./h – all Tunze –  the pumps are on timer, reversing the flow every 12 hours

Pump from sump: 2000 l./h Aqua-bee

Chiller: Resun 15R it is rated for a smaller aquarium, but with the thermoglass and insulation with styrofoam I hope it is enough. In addition I can ventilate the whole room by drawing in fresh cold air through a ventilation fan in the outer wall and there is a fan in the ceiling drawing out the hot air in the room through the roof.

Aquarium circulation

The three Tunze pumps on each side og the overflow. They alternate the flow every 12 hours.

My algae reactor, so fra running just for test. to the left the filter aquarium.

My algae reactor, so far running just as a test. To the left the filter aquarium.

From the sump, the water is pumped to a 140 liter aquarium filled with live rock. Above the aqurium there is a 39 W LED. I hope most of the algae will grow the filterinstead of the main tank.

From the sump, the water is pumped to a 140 liter aquarium filled with live rock. Above the aquarium there is a 39 W LED. I hope most of the algae will grow in the filter instead of the main tank.

The sump with the two outlets from the main tank, running in to a filter bag. The filter is actualle maid for straining water from berries, but it is perfect  for filtrating larger particles. The mean midget skimmer is running af some extensive repairs

The sump with the two outlets from the main tank, running into a filter bag. The filter is actualle made for straining water from berries, but it is perfect for filtrating larger particles. The mean midget skimmer is running after some extensive repairs

 

 

 

 

Posted in Coldwater aquarium Also tagged , , |