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#1
07-07-2008, 04:55 PM
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If you can get some more Weldon 3 or 4 in there and clamp it, you should be fine. Chances are if it doesn't leak when you test fill it, it won't leak later.
A hot air plastic welder is the perfect solution but not everyone has access to one. 
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#2
07-07-2008, 05:00 PM
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I don't know how to get any in there.. I just looked up weldon 40.. I thought it was in a tube like #16 but it is more like a paste you have to smear on.. I had read it was like caulking, but I think that is weldon 42.. looks expensive as well.. I wanted to buy the acid that keeps the solvent from evaporating so fast but none of the plastic shops here will sell it too me.
I hope this isn't toast.. I have but a lot of time into this little bugger!! 
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Chad
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#3
07-07-2008, 07:32 PM
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why not use some 16??
i reinforce all my exterior joints with a bead of 16, it isn't pretty but thats not what matters.
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` 120S RR tank with 60G basement sump / fuge Return Pump: Little Giant 4-MDQX SC Water Movement: Seio 1500, (2) Hydor Koralia 4's Lighting: 400W SE MH with 14K Aqua Connect Skimmer: Euro-Reef RS250 with gate valve Other: RODI, RDSB, PO4 / AC reactor
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#4
07-07-2008, 08:02 PM
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yeah, I have been thinking about that.. I was going to trim off the excess from the base.. but now maybe I will leave it on and put a bead around the outside.
I do notice that when I use weldon 16 or or even #4 that it leaves tiny bubbles in it. What causes that.. even on all my seams there are tiny bubbles along the very edge (out side of the seam).
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Chad
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#5
07-08-2008, 04:54 AM
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Chad just cut a piece of acrylic about 1" wide and glue that to the inside bottom of your sump. Put it in place and squirt weldon 5 everywhere around the joints until it seeped through then press it down with something. That should seal the gap and better than starting over. besides its just the bottom of the sump right? probably covered with sand of some sort...... or gunk....
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____________ If people don't die, it wouldn't make living important. And why do we fall? So we can learn to pick ourselves up.
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#6
07-08-2008, 05:15 PM
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yeah, I might just do something like that. If I had left it alone to what it was originally I would have had a perfect joint I think.. but noooo.. I had to try and make it perfect.. and well.. that is when things went wrong! lol..
oh well... my learning experience for sure.
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Chad
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#7
07-08-2008, 05:20 PM
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Hey Gents, I just bought an acrylic sump that turned out to have been dropped on one of the corners and is leaking very slowly from a 1/2 inch crack just above the bottom seam and about 1 inch from the corner, stupidly I tried regular aquarium silicone to stop it but it didn't work out.
Where can I snag some of this weldon stuff? I had heard I needed to go to a specialty retailer to get something suitable for my problem? thanks a bunch guys..... Last edited by Whatigot; 07-08-2008 at 05:21 PM. Reason: clarity
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