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Need advice on leaking 300g acrylic..........

9 years 1 month ago #26909 by nuth88
Sorry for the Derail -

I was, but missed the June Special, waiting to see if something jumps up before the ACA

"I guess that's the way the whole durned human comedy keeps perpetuatin' itself."

(The Stranger - 6/1998)

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9 years 1 month ago #26908 by sawboy2
Replied by sawboy2 on topic Need advice on leaking 300g acrylic..........
Thought you were going with new from Schindler?????

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9 years 1 month ago #26907 by nuth88

Looks like i woke up the evil spirits.  I just found a puddle under a 125 gallon tank. 

nuts.


Kharma is a Bitch!

Just Kidding, Hope you get it fixed as well....

Still Looking Here!

"I guess that's the way the whole durned human comedy keeps perpetuatin' itself."

(The Stranger - 6/1998)

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9 years 1 month ago #26905 by baldtaxguy
Replied by baldtaxguy on topic Need advice on leaking 300g acrylic..........
Bummer

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9 years 1 month ago #26903 by mikeg2929
Looks like i woke up the evil spirits.  I just found a puddle under a 125 gallon tank. 

nuts.

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9 years 1 month ago #26898 by Kegger22

  Is it possible that it was "stressed" during the move ??? 


considering that you stated that it was 2 opposite corners, that tells me it twisted which could put undo pressure on opposite corners and the only 2 things that I could think of that would cause that would be during the move because even if you used only 2 people to move it, it is very difficult for both people to move in unisense(sp)? causing it to tweak somewhat or what you may wish to do is check the top of the plywood on the stand and when the tank is empty just sitting on the stand check all the way around where the tank meets the stand and see if you can see even the slightest of light between the bottom of the tank and the stand and if there is any gap you would have to shim it so it's braced evenly and wouldn't twist when adding the extra weight of water into it

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9 years 1 month ago #26893 by mikeg2929
You'll need to find out which strength of weld on to use.  There is a thick and a thin version and several types between.  It depends on the applications.  When i saw my acrylics being built, he used thin pins to separate the seems then he flooded the area and then he pulled out the pins.  The nice thing is the weld on is very easy to remove - it just gets buffed / sanded off. 

Like I said - join reefcentral.com (or is it org) and pose this question there.  Reefers are known for building, rebuilding and modifying the tanks they use.  There are also several (many) acrylic fabricators on reef central who can help.  I would go bigger than 3/4 inch only because I saw a guy use 1..5" to fix a big tank and it worked.

There are no second chances on this, once the triangular pieces are in you are set. 

Good luck. 

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9 years 1 month ago #26892 by Jim in Michiana
Thanks for your reply...

The tank is obviously NOT a homebuilt.......  Is it possible that it was "stressed" during the move ??? 

The stand IS designed with a "tabletop" with plywood and 1/2" foam sheeting underneath the entire tank.

Assuming it was a "BAD" weld originally, I'm thinking that I will be reinforcing ALL 4 corner welds with 3/4" triangular stock PLUS trying to wick in some Weldon 4 into the original edges for additional strength.  The top and bottom welds all appear to be clear and solid.

Anyone with more input or experience is welcome to chime in.

Thanks, Jim

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9 years 1 month ago #26882 by mikeg2929

I personally don't have any acrylic experience

Of course that doesn't stop you from having an opinion. Ahh the good old GCCA! ;) 

I have had many acrylic tanks.  Most made by a craftsman who learned on the job, and while he was making them for me. 

The first ones failed over time.  Acrylic tanks must be supported 100% corner to corner and underneath.  Basically you need a table rather than a 4 post, corner only solution.

If your stand doesnt support the bottom - fix the stand too.

The builder of my tanks stopped making tanks because the margin was so slim.  He now makes custom garage doors - go figure.

If the tank is hazy - you have a bad weld.  The plastic isn't fused and it will continue to fail. 

Square stock or triangular doesn't matter.  Adhesion and surface area does.  Don't fool around - get the biggest stock you can find - or make.  You could make some bigger pieces from smaller pieces.  see if you can get 1" by 2" stock and make a right angle from those - massive surface area.

The best place to learn about doing this is Reefcentral.org.  There are quite a few experts out there and most are willing to offer free assistance.  Get it from someone who knows. 

Good luck.  And go kick the ass off the seller. 

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9 years 1 month ago #26881 by dragonkeeper
Tough call. Big tank small leaks could turn into a catastrophe over night. I personally don't have any acrylic experience, but I would use square bars and Weldon in the corners and make darn sure that the center brace is 100% strong. If you have any doubts about the center bracing then I would beef that up too. My opinion is once acrylic tanks start to go they don't stop having problems.

Good luck with it and keep us posted.

DragonKeeper
~Retired President~

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