As a further addition to this, I have noted that some general purpose
sealants do say 'not suitable for continuous submersion' and therefore I
have changed the site to specifically recommend marine or aquarium silicone
sealant (which is effectively the same stuff, just with better adhesion).

"J C-W" wrote in message
...
The plastics used are commonly used in commercial filters, and obviously
the
brushes and fittings are supplied by aquatics specialists, so are safe.
The
adhesive is sealed by silicone sealant, so should not be exposed to the
water, and the sealant, once completely dry, is inert, so should present
no
problems to aquatic life. The important thing is to make sure the sealant
is completely dry before installation as it contains ammonia, which is
toxic
to fish, but this is driven off in the curing process. I should perhaps
put
in a recommendation to leave it 24 hours before installatiuon to be
completely sure.

J

"ned" wrote in message
...
J C-W wrote:

snip
Thanks for your patience people, and sorry this thread has got so
out
of hand.


One slight niggling worry I have. Are all the materials mentioned,
safe for use with aquatic life?

--
ned



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