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Menampilkan postingan dari April, 2009

LIGHTING

Anyone who is experienced in this hobby will agree that full-spectrum illumination or, better yet, sunlight will enhance and improve skin condition and color in. Lighting also provides the fish with certain metabolic capabilities. Without a full-spectrum light source such as natural sunlight or full-spectrum fluorescent bulbs, the fish will not be able to activate Vitamin D in their skin cells and will eventually suffer calcium abnormalities, which may stunt growth or depress the immune system. Darkness is just as important as lighting. Though they do not close their eyes, fish require sleep, and a lack of sleep contributes to the cumulative effects of chronic stress. Fish that are deprived of a natural cycle of light and dark do not perform as well as fish that are allowed to sleep in darkness. Indeed, fish deprived of darkness still sleep, although they do not derive anything near the benefits that fish with a night and day cycle do. The best light cycle is sixteen hours of bright li...

Criteria for selecting Asian Arowana

For most of us, after deciding that we ready to rear this Asian Aro, some questions arise...and one of them is selection. I find the following guideline the basic yet helpful way of selecting this magnificiant fish. Each and every criteria are as important. ============================== =========================== Source: UNOAQUATIC FISH FARM TRADING (1) Swimming posture is amongst some of the important features when selecting an Arowana. Good swimming posture, coupled with stunning colors is the main reason why so many people are attracted to Arowana. It is the only mode of channel that the Dragon Fish can exhibit its grand and majestic beauty with. A good swimming posture is one with ease and effortless; turning should be smooth, graceful and at a moderately slow speed. At all times, its body should be straight, horizontal and at the top portion of the waters. When swimming, the front portion (including the head) of the body should remain stable and only the back portion (including...

Automating Water Changes

So let's talk about automating water changes. I will discuss the automation of a single tank that is running on its own filter and then explain how the simple concepts can be expanded to multiple tanks. The idea is to have a holding tank for the water that you will use to do water changes. You connect a hose directly from your water supply to your holding tank. A water pump in the holding tank puts the water into the tank, which overflows into your house drain. Step 1 is to get a holding tank that is of sufficient size to accommodate your water changes. You should account for the space left at the top and bottom when deciding on the size / dimensions of this tank. You will need heaters and a recycling pump in the tank so you cannot drain it completely when filling your tanks. I leave about 1.5 inches (4cm) of water in the tank. You also cannot fill it right to the top. There was no room in my fish room for a vertical tank, such as a large garbage can so I had an acrylic tank bu...

Why Asian Arowana is expensive?

I have done this article long time ago for another forum I was actively in. Doing some "clean up" on my computer recently...I thought I take it out and share it here. It just a general description, as I am not looking into reading up hundreds of pages book.May it serves as food for thought for some. Perhaps some other will like to join in and put in more thoughts. Enjoy! ============================== ============================ The Asian Arowana Scleropages formosus is considered one of the most expensive freshwater fish in the world. With its brightly colored scales and barbells at the tip of its mouth, it is also known as the Dragon Fish, or sometimes referred as the Asian bonytongue. It is also believed by many as a recreation of the mysticism Dragon, a powerful protector against evil. It has a significance value especially in the Chinese culture. Not only that but they are considered to be “lucky” fish. I have also often heard belief that these magnificent fish could k...

Most topics are discussed in the mailing list.

Here are some tips to share with you. Here are some tips to share with you. Most topics are discussed in the mailing list. Be sure that these answers are not always YOUR answers ----------------------------------------------------------- Q: What is the key point to select a juvenile fish? A: What you like is your best! That's all. :-) Well, in the case of red arowana, you should check the color of pectoral fins. Most so called "Banjar Red" have light color pectoral fins. If the fins are in dark color, the arowana is hopeful. In the case of cross back golden, you should check these points; back scales are in light color, side scales are bright and scales near the dorsal fin are clear. If you really want to get good one, I recommend to purchase a good adult one. This is the truth. Q: What is the difference between chili red and blood red? Q: Are chili red better than blood red? A: "Chili Red " and "Blood Red " are names for wild arowana. Chili red live i...

Arowana Gender Index (AGI)

All info and pictures taken from Qianhu.com Asian Arowana (Scleropages formosus) breeding in the region is normally restricted to earthen ponds. One of the limiting factors in increasing production is the inability to determine the sex of the brooders. Determining the sex of the arowana is important in determining the sex ratio of the brooders to maximize breeding. In a collaboration R&D effort between Qian Hu and Mr Alex Chang of Ngee Ann Polytechnic, a novel approach of sex determination of the brooders using the Arowana Gender Index (AGI) was developed. Now commercial ornamental fish breeders can use this information to better determine the model ratio of the two genders to achieve the highest number of juvenile Arowana. This method offers a cheaper, simpler and efficient alternative to the traditional expensive DNA studies. The method uses the differences in the relationship among the linear measures of the male and female adult asian arowana. The method yields high percentage ...

How to determine Chili or Blood Red :

Seems like everybody especially rookie trader of Arowana has misidentified the SuperRed type , especially between Chili and Blood Red I knew there are many line up of names like Ultra Red , Papaya Red , Panda Red and Metal Red and etc. but lets get back to the roots , the anchestor of real SuperRed Aro variety now, I . Blood Red ,commonly named GudangGaram Red or MerahDarah Red first in Indonesia back in 1986 , it’s a variety of Super Red which identified as follow : a. Ussualy bigger than chili Red at same age after more than 6month old b. Body , broader dan rounded shaped ,especially at the edge . The eye looks smaller, and bigger head compare to ChiliRed , fan (rounded) shape tail and also broader too c. Colour , bloodred always developt colour faster and reach adult colouration earlier than ChiliRed , the rings will be thickened up to fill the whole core scale (outside to inside), then reach the full red scale ...

Accelerate crossing back rings (6th level rings)

In my experience : 1. Use light /whitish coloured gravel/ bottom 2. Do not put lamp on top of the tank , instead put lamp on the bottom of it. 3. tanning , tanning and more tanning In theory , to adapt camouflage, the fish will follow the colour of the river to cover it's appearance ,so most of them will get it's back's rings dark coloured , even when they were adult size crossback SR will have their back's ring darker core than the rest 5 level rings. Try to manipulate the bottom colour to accelerate crossback process, remember Bloodred are faster in crossing back rings than Chili Red

Colour temperature

Colour temperature by the way is not related to temperature radiation of light caused by the lighting device or else . Colour temperature is the measurement of colour intensity , not power intensity (lumens/candle power degree) Low colour temp ( exp : 1000K ) is red coloured , high colour temp (exp : 22.000K ) is whitish blue the more lower the colour temp , more redish the light the more higher the colour temp , more buish the light The UV spectrum is place between 12.000K to 16.000K , UV by the meaning is not pure UV lighting device (like the one for UV sterilizer) is very harmful ray to human/ animal eye. To understand why blue is determined as warmer/ hotter in colour temp then red , try to photograph the Actnic blue TL lamp, you ll see that the picture taken in washout (burned over exposure like you re shot at the sun ) by just seem like a dim blue light

Colour Boosting

Sharing experience for colour boosting , based on my C@be (N1wan's ChiliRed) 1. Tanning method a. Sunray , since 7.30am to 11.00am the tank will be exposed to sunray bath at angled direction b. At 11.00am to 20.00pm tanning held by 1 @30W 16.000K TL light (submerged underwater) at just below water level and 1 @20W 16.000K TL and 1@ 20W Actnic Blue 22.000K TL . , The light tube will replaced every 4 months 2. Water management : pH level set at 6.3 and gH level at 8.0-9.0 , salinity low , pH level managed decreasing with blackwater , increasing with water changing ( my arthesis water are pH 7.6, stabil with good buffering capacity level) Oxygen level managed by aerator pump and sprayed water from canister output, O3 treatment 1hour every day to keep sterilize the tank. Blackwater treatment : every 3days ,tank's water changed 30% and treated with blackwater extract to be pH6.3 . gH is lowered using io...