I took a risk. 425 craigslist rebuild

  • We are currently upgrading MFK. thanks! -neo
wednesday13 said:
False....i used ge #2 back in 07-08 when it came out and witnessed the effects first hand. The fish's slime coats and skin began to melt off after a couple weeks in the tank. Ugly, bloody looking mess with fish twitching around convulsing. Once removed the fish recovered quickly. Luckily i saved most of them in time. It was 100% the ge#2. There is ge #2 sold without mold inhibitor out there so its more likely u used one of those muttly instead of a mold inhibitor. O.P. take the time to strip it down/out for a redo or it may be possible to cover it up with fish safe silicone. I do agree the RTV is far superior to Ge1 in general but the mold inhibitor in ur fish tank is common sense not too.
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How long did you let the silicone cure? My guess is that you did not give it long enough and that is what your issue was. Once silicone is cured it is completely inert, whether it has mold inhibitors or not. So GE II is safe, if and only if you let it cure long enough, which most people dont. You should be giving a 1/4" bead of silicone of any kind at least two weeks to fully cure.
 
You're a braver man than I, with your used plywood tank.

But hey, if you can leak test it and everything checks out you should be good!

I'll be following along

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fishguy306 said:
How long did you let the silicone cure? My guess is that you did not give it long enough and that is what your issue was. Once silicone is cured it is completely inert, whether it has mold inhibitors or not. So GE II is safe, if and only if you let it cure long enough, which most people dont. You should be giving a 1/4" bead of silicone of any kind at least two weeks to fully cure.
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Ive never filled a tank i resealed quicker than 2-3weeks cure time even in my early yrs. Its common knowledge ge2 with mold inhibitors is bad news for fish. Cure time is bogus anyway as a tank would most likely fail if it wasent cured properly...plenty more threads on here about ge2 mold inhibitors being unsafe. Y chance it for $20 or less to redo the window when the stock list probably outweighs that price?
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Just because it is common knowledge does not mean that is is correct. There is a lot of "common knowledge" around here that is dead wrong. And if not fully cured it may fail, it may not, lot of factors besides it being fully cured.

That all said, I think it is stupid to use GE I or II for anything aquarium building related. I completely agree on your statement, why chance it with cheap and crappy silicone? Buy the good stuff and do it right the first time. RTV 103 or 108 will hold properly, there is no risk of toxins and it really isn't that much more expensive. When you have hundreds of dollars of fish what is another $5/tube of silicone?
 
fishguy306 said:
Just because it is common knowledge does not mean that is is correct. There is a lot of "common knowledge" around here that is dead wrong. And if not fully cured it may fail, it may not, lot of factors besides it being fully cured.

That all said, I think it is stupid to use GE I or II for anything aquarium building related. I completely agree on your statement, why chance it with cheap and crappy silicone? Buy the good stuff and do it right the first time. RTV 103 or 108 will hold properly, there is no risk of toxins and it really isn't that much more expensive. When you have hundreds of dollars of fish what is another $5/tube of silicone?
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Were on the same page, i like your logic....easy to spot a seasond mfk just from a few statements lol...

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