Well then drain your tank 4" and wait till it developes a skin and then use a damp cloth.
Cutting out a centerbrace in a 90g tank while it's full can be poisionous (to the wife

) as well but we only live once :twisted: . Well maybe but who knows.
It's not like the silicone is the same viscosity as water so it's not going to flow into your tank.
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No matter what the morrow brings, inventors keep inventing things.
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Jonathan
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www.cakerybakery.ca