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Thread: CO2?

  1. #9
    swords's Avatar
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    I've been researching and running planted aquariums for quite some time so yes, I know that plants respiration reverses at night-that's when the wipeouts occur in planted fishtanks is at night. I also know that there is no magic event that happens if your PH is "7.0" as all the fish shops tell you, I've known that for years, of course the fish shops will tell you otherwise!

    What I was getting at is that I dislike & distrust relying upon equiptment when (Fish) lives are at stake, and the DIY generator generates small "safe" amounts of CO2 that will benefit the plants - I get heavy pearling on my plants by using the DIY generator (each plant looks like a tiny airstone is inside of it) But a DIY generator will not generate enough CO2 to harm the fish at night, that's all I was meant. Sorry I didn't make it clearer. I wouldn't mind having a pressurized unit for a greenhouse or grow room though!

    Did you know that the common $20 "silver arrowana" that is sold in the US is actually an Arapima gigas from the amazon which can attain lengths of 15 feet. The true red & gold asian arrowanas from Taiwan run about $450 - $4500 and only get about 4 feet. If you have a fish shop with a good book section check out Jurassic Fishes by TFH books if you have an interest in big fish. I want a paddlefish myself, and the fish shop did have them last summer but it's eventual 250 lbs and 6 ft length (and diet of planktonic foods) kept me from getting that fish, even though it was only $19,99.

  2. #10
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    Sorry Swords, The Silver arrowana (and the Black ARrowana) are full fledged arrowanas, though they are from a different family than the asians... which btw, for those of you interested, are completely and utterly illegal to import into the US, they are a CITIES protected species.

    Swords, Arapaima are huge, some consider them to be the largest fresh water fish in the world, and are related to arrowanas, but are not arrowanas themselves... if you look closely at photos, you will see aside from the massive difference in size, that tha arapaima is more shovel nosed, while the Arrowana has a very thin head.

    It very well may be that many silvers in the US are actually Arapaimas, in which case, I hope their owners have very large ponds (with fences to keep small children, dogs, and cats away). But all the silvers I have seen are true Osteoglossum.

    Silver, Black, AFrican and Australia Arrowanas (Osteoglossum) have a tounge with small teeth in it, and a rough bony plate on the top of their mouths. when they eat their food, the use the tounge teeth to hold the prey and rend it to bits along the bony plate... Silver arrowanas can co-exist with anything big enough not to fit in their mouths, Jardini's are territorial and like to nibble on things...

    Asians, the Gold Crossback being the most desireable if I remember right, are gorgeous fish as well, but I have always been captivated by the silver from the Amazon... there is just something beautiful about it.

    I am also fascinated that during flood seasons this fish is known to jump from the water and consume birds sitting on low lieing branches.

    just as fun, for those of you interested in this discourse, All Arrowanas and Arapima are mouth brooders, much like a kangaroo gives birth and keeps the joey in it's pouch, the Arrowana gives birht, then the male keeps the young save in it's mouth. It will not eat during this time, though many suspect that it swallows it's young by accident every now and again... (Whats one baby compared to hundreds?)

    Most of the Silver arrowanas you see in the stores in the US were caught when fishermen killed the father fish, and scooped the brood out. The Arrowana is a stable in many south american diets, and it used to be that these young fish died, once they fishermen learned their value on the world aquarium market however, they began selling the young. Most fisheries and nurseries will grow them out until their yolk sack is gone. If your interested in buying any of these fish, first, make sure you have the skill to keep it, their water requirements are tremendous both in space (many hundreds of gallons) and quality, your looking at a 300 gallon minimum to keep an adult healthy and happy. If the tank is to narrow, the fish will get spinal curvature... so it really needs to be huge.


    Osteoglossum bicirrhosum - Silver Arrowana - http://web.singnet.com.sg/~deswong/silver.htm

    http://www.aquariumfish.net/catalog_...d/arowanas.htm

    Arapaima giga - http://www.newarkpc.com/guyana/arapaima.htm
    \"Maybe in order to understand mankind, we have to look at the word itself: \"Mankind\". Basically, it\'s made up of two separate words - \"mank\" and \"ind\". What do these words mean ? It\'s a mystery, and that\'s why so is mankind.\" ~ Jack Handey

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    asian fish
    found in the great lakes
    can eat all the ecosystem here, can jump 2 metres out of water, so birds are in its diet, grows to 1.2 metres and can be 260 lbs average, very bad thing, has been found twice in great lakes in past week

  4. #12
    swords's Avatar
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    Most shops here (in Mpls/st paul) sell their arrowanas with yolk sack still attached (World of Fish does not). I suppse that's how they all get the super cheap $19,00 price tag.

    I have no interest in keeping large fishes. Well I do but I never will unless I have a large pond inside a greenhouse or something. I really wish that shops would not sell them, most of these large fishes purchases are done by impulse shoppers who have no clue what they're buying when they get an arrowana, then when its too large to be taken out of the 55 gallon tank it was bough for it suffers and dies. I've even seen one unscrupulous fish shop selling "Dwarf Pacus" there's no such thing, only "young pacus"....

    I keep & breed killifishes which are usually in the 1-3" size range but have awesome colors. The Aphyosiemon austerale (all varieties) is my favorite then the A. gardneri (steel blue var.). I don't care for the Asian species (Apolohelius - spelling on this??)as the pairs I have seem very agressive and are avid jumpers. I've noticed that long fiber sphagnum works great for my Nepenthes and in the bottom of my killie tanks! Grows aquatic plants like crazy too if you mix it with flourite or kitty litter clay and some granulated Laterite as a substrate.

    A bit off topic I suppose! Hope nobody minds too much!

  5. #13
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    I think were the only ones here swords!

    I think Killifish are pretty darn cool.

    I agree with pet shops selling big fish. I have one I go to here, and it is the only place I go, because 1) I know the owner, and 2) I have seen him on multiple occasions refuse to sell a fish to someone who either A) Lacked experience or B) didn't have a good enough setup.

    Since I knew him, he actually came over and inspected my setup before I bought the arrowana, and while we both knew I would have to get a bigger tank in a year or two (I was going to) he sold me the arrowana... well, life changes, and the 300 I was going to buy never found a place in the budget, so I sold the arrowana back before it got to big, and thankfully, his gill curl went away since the shop used RO water with RO right...

    Dwarf paci IS a load of tripe... but I tend to stay away from fish that would consider my planted tanks a vegetable buffet ya know?

    Right now all I am keeping are 4 fan tail oranda's... more for my wifes pleasure than mine... I am making plans to build a book case with a 200 gal equivalent terrarium in it, (glass only in front, seal the sides bottom top and back with acrylic resin paint) if that works out, I want to sell my 55 show (It's in great condition) and buy a 75 gallon tall hex. I don't have room for a 300 in this apartment... when I the 75 up I plan on building a minature coral reef system in it...

    then, someday, when I have the house, 300 gallon tank going in. [img]http://www.**********.com/iB_html/non-cgi/emoticons/smile.gif[/img] will probably be an amazon river system with a large arrowana in it... and if I do two... will probably put discus in the other one. Rio Negro style. [img]http://www.**********.com/iB_html/non-cgi/emoticons/smile.gif[/img]
    \"Maybe in order to understand mankind, we have to look at the word itself: \"Mankind\". Basically, it\'s made up of two separate words - \"mank\" and \"ind\". What do these words mean ? It\'s a mystery, and that\'s why so is mankind.\" ~ Jack Handey

  6. #14
    swords's Avatar
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    Women just love the goldfish don't they? Since I got my first fishtank my girlfriends have said "what about goldfish?". Maybe cos they're "cute" or something! [img]http://www.**********.com/iB_html/non-cgi/emoticons/biggrin.gif[/img]

    My favorite fish (looks and personality wise) was my pair of dragon gobys (or "violet gobys"). They would eat from my hand and got very large (about 12" when I sold them to a friends fish shop (he said he'd never seen such good looking well fed dragon gobys so that made me happy) but they dug up my plants making burrows (or something) so I ended up getting rid of them. I later found out they are brackish water fish but aren't strictly brackish so long as the water is clean (which explained why they thrived in my planted tank). If I ever get a large tank (the gobys may get 24") and are meat eaters so they need a heavy duty tank and filtration. I just love their huge heads and tiny eyes! (and of course their look of a chinese dragons when they slither up the side of the tank to eat some bloodworms.

    I like a responsible fish shop. there are a few here in MN, among them World of Fish and Wet pets (my pals shop) who sold me my first fish when I was a little boy and still has a nice family run shop - they sell my sexable killifish juveniles too. [img]http://www.**********.com/iB_html/non-cgi/emoticons/smile.gif[/img]

    If you're going into a reef tanks Have you seen these books?
    The Conscientious Marine Aquarist (M. Fenner)
    Natural reef Aquariums (J. Tullock)
    Aquarium Corals (E. Borneman)
    They're published by Microcosm/TFH but they're much better than the usual TFH books, more along the lines of the Nepenthes of Borneo & Sumatra for reef tanks. About 400pg each (about $50 ea).

  7. #15
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    I had a dragon goby once and just like you, they tore up my tank, pulled out all manner of plants and shoved them under a log to make a nice soft bed. (must be where they got the name dragon)

    have you ever kept a Bicher fish? talk about an awesome predator... very much like a goby in size and shape, but imho, very much cooler... can get a lot bigger...

    aside from my arrowana, my bicher was my favorite, quickly followed by my black knife... which I loved, but could never see cause, well, knife fish are shy and all! [img]http://www.**********.com/iB_html/non-cgi/emoticons/smile.gif[/img]
    \"Maybe in order to understand mankind, we have to look at the word itself: \"Mankind\". Basically, it\'s made up of two separate words - \"mank\" and \"ind\". What do these words mean ? It\'s a mystery, and that\'s why so is mankind.\" ~ Jack Handey

  8. #16

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    hi
    what does imho mean ?
    i [img]http://www.**********.com/iB_html/non-cgi/emoticons/confused.gif[/img]

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