Can You Safely Reseal a Tank With Silicone While Fish are in It?

livinlifeinBKK

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Hey, so i have a nano that's leaking a little and was going to pick up a Greissenger goby as the only inhabitants of the tank tomorrow but just realized the seams connecting the tank panels are leaking and need to be resealed...can i reseal them with the fish in the tank or will that release toxic chemicals that could kill the fish?
 
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livinlifeinBKK

livinlifeinBKK

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Pretty sure it's only one seam so i can probably even reseal it from the outside...
 

Bucs20fan

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The silicone is only non toxic once it cures, at least that is the case in the ones that ive bought here in the US
 

MoshJosh

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I don't think it's a good idea, the active leak will be getting the silicone wet as it's trying to cure, plus the new silicone wont stick to the old (inside of the seam) so I image it will eventual fail and you will have a leak again. Better to drain and reseal or replace the tank. . . in my opinion

May work temporarily, but probably not a good idea
 

ReeferHD

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if it's a small tank i'd just get a tub from a hardware store with a HOB/Canister filter to put all the livestock into while you reseal the tank.
 
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livinlifeinBKK

livinlifeinBKK

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Honestly, for a Greissenger Goby a 2.5 gallon with live rock taken from my other tanks (which have pods wouldn't be such a terrible home for a little while. They're such tiny fish!
 
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