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Marge
January 19th 10, 11:35 AM
Is standard silicon sealant safe in a fish tank?

I had a problem with waste gathering between a black plastic filter/
pump cage and inside edge of glass so removed the cage and refitted
with standard sealant leaving no gap for water/waste to get between
cage and glass.

Silicon was fully cured before adding water, fish lived happily for
over 6 months but recently had problems and noticed slight oily film
on water suface.

Could this be down to silicon all this time later? could it be
possible that various tank cleaning fluids react with the silicon?

Stephen Wolstenholme
January 19th 10, 12:21 PM
On Tue, 19 Jan 2010 03:35:04 -0800 (PST), Marge
> wrote:

>Is standard silicon sealant safe in a fish tank?
>
>I had a problem with waste gathering between a black plastic filter/
>pump cage and inside edge of glass so removed the cage and refitted
>with standard sealant leaving no gap for water/waste to get between
>cage and glass.
>
>Silicon was fully cured before adding water, fish lived happily for
>over 6 months but recently had problems and noticed slight oily film
>on water suface.
>
>Could this be down to silicon all this time later? could it be
>possible that various tank cleaning fluids react with the silicon?

After six months the silicone sealant will not be the problem. The
problems with some sealants is they contain fungicides that kill fish
and some are useless for gluing glass.

Steve

--
Neural Planner Software Ltd www.NPSL1.com

Neural network applications, help and support.

Marge
January 19th 10, 01:15 PM
On 19 Jan, 12:21, Stephen Wolstenholme >
wrote:
> On Tue, 19 Jan 2010 03:35:04 -0800 (PST), Marge
>
> > wrote:
> >Is standard silicon sealant safe in a fish tank?
>
> >I had a problem with waste gathering between a black plastic filter/
> >pump cage and inside edge of glass so removed the cage and refitted
> >with standard sealant leaving no gap for water/waste to get between
> >cage and glass.
>
> >Silicon was fully cured before adding water, fish lived happily for
> >over 6 months but recently had problems and noticed slight oily film
> >on water suface.
>
> >Could this be down to silicon all this time later? could it be
> >possible that various tank cleaning fluids react with the silicon?
>
> After six months the silicone sealant will not be the problem. The
> problems with some sealants is they contain fungicides that kill fish
> and some are useless for gluing glass.
>
> Steve
>
> --
> Neural Planner Software Ltd * * * * * * * * *www.NPSL1.com
>
> Neural network applications, help and support.

Thanks Steve,
Just needed to know, selling tank on and didn't want to pass on
anything harmful.