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03/13/2015, 11:00 AM | #976 |
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At this point I don't think it's about replacing the one broke section. I think it's about getting thicker acrylic all the way around
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03/13/2015, 11:07 AM | #977 |
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A friend on mine brought up a point worth considering. The UV from the sun is really hard on plastics and he was wondering if anyone has looked into the impact of the newer LEDs (with UV range) on acrylic tanks. BTW: he is also the one that took my avatar's picture of a reverse colored moray eel while diving off Bonaire.
Joe |
03/13/2015, 11:21 AM | #978 | |
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03/13/2015, 11:32 AM | #979 |
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So sorry to hear such a disaster, always remember theres nothing important than you and your families health, I just cannot imagine what happens if such a large installation breaks down while little kids playing in front.
I am not an experienced reefer therefore cannot comment for reasons. Just wanted to share a point I previously heard somewhere. They say if the sand is too thick and starts To harden (Precipitations etc), it may create a force to push the glass, in time. Of course I do not know about your sand status, just an opinion.. Best wishes from Turkey.
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03/13/2015, 02:26 PM | #980 |
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Peter I had heard a rumour that there was a failure but reading about and seeing it is heartbreaking. I know this was a huge project and you have exceeded everyone's expectations with the development of this tiny slice of nature. An amazing success.
Please accept my gratitude for sharing this with all of us and my condolences for the sudden loss of your tank and its inhabitants. I wish you well on the next tank and look forward to seeing it progress. Best wishes |
03/13/2015, 02:37 PM | #981 |
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Speechless.
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03/13/2015, 02:59 PM | #982 |
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so sorry to hear about this peter and shawn I wasn't aware of this till shawn had spoken at the mast meeting. I was speechless.oh and by the way excellent talk at the meeting shawn.i think next time it would be cool to bring peter with you.
I was also thinking about that hardwood floor. its truly a disaster. I do hope ATM helps out. if I can help in anyway just holler. vic |
03/13/2015, 08:06 PM | #983 |
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03/13/2015, 08:08 PM | #984 |
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So sorry Peter!
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03/13/2015, 08:09 PM | #985 |
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03/13/2015, 08:10 PM | #986 | |
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03/13/2015, 08:15 PM | #987 |
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03/13/2015, 08:22 PM | #988 | |
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The other issue is if they don't honour a warranty now, why would they do so in the future. Apart from all that, the insurance company will not allow another one of their tanks in Peter's home. |
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03/13/2015, 08:35 PM | #989 | |
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03/13/2015, 08:38 PM | #990 | |
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03/13/2015, 08:40 PM | #991 | |
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03/13/2015, 08:48 PM | #992 | |
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Yes, sand often does harden and it might even apply pressure, but Peter's sand is frequently stirred and when removed it was not clumped at all. |
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03/14/2015, 02:51 AM | #993 |
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So sad to read about the loss of the stock, years of coral growth it must be truly heartbreaking.
Looking forward to see how the new build looks, in the light of hindsight what changes are made to the new design Best wishes from England |
03/14/2015, 08:06 AM | #994 | |||
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Seriously though, what is going to happen to it?
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03/14/2015, 09:07 AM | #995 |
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The proper way is to anneal is to put the tank in the oven at a specific temperature, unfortunately a lot of acrylic tank manufactures don't have this equipment as it expensive, let alone having an oven big enough to fit a tank like Peter's .
Here is some info Proper annealing is one of the most effective single measures that can be taken to insure good service from parts made of Plexiglas® sheet. Annealing consists of prolonged heating of the acrylic part at temperatures lower than those used for forming, followed by slow cooling. Internal stresses set up during fabrication of the article are reduced or eliminated by this treatment All edges should be cut or machined with as little internal stress as possible. If excessive internal stress is present in the parts to be cemented, crazing will occur during the cementing process. It may be necessary to anneal the parts to reduce internal stresses that set up in the parts during fabrication or thermoforming operations. Annealing results in greater dimensional stability and greater resistance to crazing. Heat treating also improves the strength of certain cemented joints. To obtain the benefits of annealing, Plexiglas® sheet parts must be annealed after all fabrication steps. including polishing, are completed. In addition to annealing after final finishing, machined parts should be annealed before cementing to reduce stress due to machining in the cement joint area. Here is a PDF http://www.plexiglas.com/export/site...-Annealing.pdf |
03/14/2015, 09:25 AM | #996 |
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What a heartbreaker. I look forward to following the next phase of the build, based on this thread I know Peter has a huge love of his tank and the inhabitants he keeps, so I know a rebuild is inevitable.
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03/14/2015, 10:05 AM | #997 | |
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annealing reduces stress brought on by fabrication and re-aligns things etc etc yes this is all true. But the point is that if you don't over-stress the material in the first place, you don't create a situation where annealing is really that necessary, and that's why (IMO) no one does it in the tank building industry. i.e. all your panels are true square where they need to be, you don't have to force things into position, you don't have a cruddy stand which causes the tank to twist, your bonding process does not cause excessive heating or other stressors, you don't flame polish or use a machine polisher that induces excessive heat but instead wet sand and then final polish with machine using proper technique, you don't clean your tank with an ammonia based cleaner, etc. Any of these items, done wrong, will lead to induced stress and the first sign of induced stress is crazing, not a joint failure. Annealing would fix the problems created by poor fabrication practices at a very extreme cost, so the easier thing to do is to just do it right from the get-go. Do I think that annealing would have saved this tank? Possibly.
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03/14/2015, 10:52 AM | #998 |
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So if the insurance company won't insure again does that mean no more tank?
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03/14/2015, 11:04 AM | #999 |
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Floyd, What does "crazing' look like?
Peter
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03/14/2015, 11:12 AM | #1000 | |
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