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Thread: Tank Repair

  1. #1
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    Tank Repair

    Hi all, I'm going to look at a multibay filter in a couple of hours with a view to stripping the sections out and using the tank for my anoxic pond.

    I'm not sure what material it is yet but was wondering if anyone could tell me if it is feasible to repair any unwanted holes etc and the best wat to go about it?

    Here's a pic of the tank..

    anoxic tank.jpg

    Thanks for any advice.



  2. #2
    Senior Member Rank = Supreme Champion Ajm's Avatar
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    It'll be fiber glass mate you can buy patch repair kits I believe

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  4. #3
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    Thanks Johnathan. The thing that was throwing me is the lack of bolts/screws/rivets on the external sides of the tank. The Kockney Koi tanks have them to secure the partitions but this one doesn't seem to have any.

  5. #4
    Senior Member Rank = Supreme Champion Ajm's Avatar
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    Quote Originally Posted by Point View Post
    Thanks Johnathan. The thing that was throwing me is the lack of bolts/screws/rivets on the external sides of the tank. The Kockney Koi tanks have them to secure the partitions but this one doesn't seem to have any.
    Dose if you zoom in you can See the flat bolt heads

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    Senior Member Rank = Supreme Champion Ajm's Avatar
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    Quote Originally Posted by Ajm View Post
    Dose if you zoom in you can See the flat bolt heads

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    Could always leave the bolts in place grind down on the inside a little and run some more ha6 or the likes around them

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  9. #6
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    Yeah, I saw those but they don't look to be in the same position as the partitions.. I suppose I'll see better when I go look at it

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    Quote Originally Posted by Ajm View Post
    Could always leave the bolts in place grind down on the inside a little and run some more ha6 or the likes around them
    I was thinking something similar.. I'm gonna insulate the outside and make a frame for it, then clad it, so I could always turn the bolts the other way around so the flat head is on the inside. Anything sticking out would then be hidden.

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    Senior Member Rank = Supreme Champion Ajm's Avatar
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    All sounds good mate be good to see a build thread on it see how well it works

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    Freddyboy the legend

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    The pond is a way off yet bud.. looks like next year now. I'm collecting materials and everything I need in the meantime but I'll take a few pics and post the build up when I do it. Got to build a sieve as well which I'll try and get done over the winter.

    At the moment I feel like I've bitten off more than I can chew with the whole garden remodel and pond build

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    Thanks for your help Jonathan, it is fibreglass so easy to take out the existing connections and repair the holes. The bolts for the partitions are also there as you thought and have been covered in black silicon so they are hard to see.. pick it up tomorrow hopefully

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    Quote Originally Posted by Point View Post
    Thanks for your help Jonathan, it is fibreglass so easy to take out the existing connections and repair the holes. The bolts for the partitions are also there as you thought and have been covered in black silicon so they are hard to see.. pick it up tomorrow hopefully
    Sounds ideal mate Tank Repair

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    Quote Originally Posted by Ajm View Post
    Sounds ideal mate Tank Repair
    It's 150mm lower than advertised so the water level is going to be very high if I double stack the anoxic baskets but I think I can make it work. It's about as close to ideal as I'm going to find I think. It was a steal at £50 and as a bonus it's only about a mile from my house.

    The fella has shut his pond down so is also selling a cetus sieve and a nexus soon but think I'll make my own sieve as I originally planned.

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    So, I've got the tank and stripped out the redundant tank connectors (and the damn sikaflex) which has left me with 3 holes to fibreglass over. 1x125mm dia. 1x 65mm dia & 1x 45mm dia.

    I've got zero experience of fibreglassing and am looking for advice on what is the best way to completely cover the holes.

    1. Cut a circular infill piece out of spare fibreglass panel, fix it in the hole, then fibreglass over it on both sides. Would I need to use more than one CSM layer if doing both sides like this?
    2. Glue a fibreglass panel to outside of hole. Grind bevel inside and fibreglass inside only.
    3. Bevel inside (or outside) and just fibreglass on that side only.
    4. Bevel both sides and fibreglass both sides.

    The tank wall seems to be about 2.5mm thick.

    Can anyone offer some advice please?

    Cheers
    Last edited by Point; 21-09-2021 at 05:44 PM.

  22. #14
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    Option 1.
    2 layers of 450gsm chopped strand mat on one side will do the trick. If you do both sides still do two layers on each side as it's not a big job and will be a proper fix.
    Sand off any top coat around the repairs first.

    Gaffa tape one one side to hold the panel in position should work. Fibreglass the opposite side and wait for it to set.

    If you didn't have spare sheets of fibreglass to make an infill panel, you could get away with clamping a sheet of wood or anything flat to one side and fibreglass to that. Just put some gaffa tape of similar of the sheet so you can remove it once the resin has gone off.
    Last edited by Alburglar; 21-09-2021 at 07:29 PM.
    Ki Matsuba, Hikari Moyo, Beni Kikokuryu, Hariwake, 99% Shiro Bekko, Yotsujiro & Doitsu Aka Bekko.

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    Thanks Alburglar. Just to clarify it for me as I'm a bit slow lol.. So you are saying use an infill piece and put 2 layers of csm over the top (possibly both sides)?

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  26. #16
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    lol.. scratch my last post, you have just clarified it.

    I've got 3 panels that I took out, which originally were the filter bay sections so have plenty to use.

    Thanks mate.

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