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Results 1 to 10 of 18

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  1. #1

    Join Date
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    Cancer - Epilepsy - Foster Care - Gynecological Cancer - Rett Syndrome - Brhino   

    Default large acrylic tank on slightly bowed stand


    0 Not allowed!
    This is a repeat of something I mentioned in my journal but I wanted to give it its own thread for increased visibility.

    I have a 300 gallon (8'x2'x30") acrylic tank that I build a stand for. Upon placing the empty tank on the stand for the first time I noted that the stand is slightly bowed such that the right and left end of the tank rests on the stand but in the middle there is a gap, approximately 1/4" wide, between tank and stand. Note that the stand is not bowing due to weight. It is solidly built but just not completely flat.

    I am wondering what the ramifications of this are and how to deal with it. I am particularly hoping to hear from anyone who has first hand experience with large acrylic tanks, or who has a good understanding on the mechanical forces at play in this situation.
    300 gallon mega tank: sailfin pleco, clown loaches, silver dollars, roseline sharks, congo tetras, new world cichlids
    125 gallon office tank: Africian cichlids, synodontis catfih
    75 gallon community tank: bolivian rams, black skirt tetras, dwarf neon rainbowfish, corys, harlequin rasboras, otos, bristlenose and bulldog plecos, assassin snails, various shrimp
    60 gallon goldfish tank: fancy goldfish

  2. #2

    Join Date
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    0 Not allowed!
    Brhino -

    While I do not have any first hand experience with acrylic tanks, my construction / engineering background tells me that you should fully support this as much as possible. I would think at least solid contact every 12" along the seams.

    It would be helpful if you link a pic of the current situation for better clarity.
    Mike
    120g Mixed Reef In Progress
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  3. #3

    Join Date
    May 2010
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    0 Not allowed!
    I had assumed that you would use the frame supports (by shimming between the vertical supports and the bottom part of the underside of the wood panel supporting the tank base) to counter that bow - that is a serious issue.
    Knowledge is fun(damental)

    A 75 gal with eight Discus, fake plants, and a lot of wood also with sand substrate. Clean up crew is down to just two Sterba's Corys. Filters: continuous new water flow; canister w/UV, in-tank algae scrubber!! Finally, junked the nitrate removal unit from hell.

    For Fishless cycling:http://www.aquaticcommunity.com/aqua...ead.php?t=5640

  4. #4

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    Cancer - Epilepsy - Foster Care - Gynecological Cancer - Rett Syndrome - Brhino   

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    0 Not allowed!
    yup, that would have been a good time, but unfortunately I didn't detect this until I had an actual 8 foot object on top of the stand. In hindsight I should have put the tank on for a test fit immediately after placing the top plywood on, before the glue dried.

    I've talked to the same mechanical engineer that helped me design the stand and his recommendation is to place another thin piece of plywood on top of the existing top, and then shim between the two pieces so that the top one is flat and fully supported. That's the best plan I've heard so far.
    300 gallon mega tank: sailfin pleco, clown loaches, silver dollars, roseline sharks, congo tetras, new world cichlids
    125 gallon office tank: Africian cichlids, synodontis catfih
    75 gallon community tank: bolivian rams, black skirt tetras, dwarf neon rainbowfish, corys, harlequin rasboras, otos, bristlenose and bulldog plecos, assassin snails, various shrimp
    60 gallon goldfish tank: fancy goldfish

  5. #5

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  6. #6

    Join Date
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    Happy Birthday Bud. Cheers! - Strider199   Merry Xmas! Ill drink to that! - Sandz   Happy New Year! - jeffs99dime   Birthday Beer. - gadget228   Sending healing vibes to your Oscar - Silbar   
    Cancer - Epilepsy - Foster Care - Gynecological Cancer - Rett Syndrome - Brhino   

    Default


    0 Not allowed!
    don't know the manufacturer, got the tank used.
    300 gallon mega tank: sailfin pleco, clown loaches, silver dollars, roseline sharks, congo tetras, new world cichlids
    125 gallon office tank: Africian cichlids, synodontis catfih
    75 gallon community tank: bolivian rams, black skirt tetras, dwarf neon rainbowfish, corys, harlequin rasboras, otos, bristlenose and bulldog plecos, assassin snails, various shrimp
    60 gallon goldfish tank: fancy goldfish

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