On Jul 14, 9:10*am, "Don Phillipson" wrote:
"arkland" wrote in message

...

I have a small 1-inch long, half-inch wide white plastic 'tab' that fell
off which holds a cover down.

It's all under water (a few thousand gallons would have to be removed to
expose it to air).

It's plastic on plastic.

Any suggestions for a good glue that works underwater?

Is there such a thing?

What did they tell you at the pool store?
(It was years ago, details now forgotten, but when I showed
the pool store expert various parts disassembled from a
filter, he told me two items were broken, i.e. ought to
comprise a single unit: *and recommended an appropriate
adhesive: *which worked.)

--
Don Phillipson
Carlsbad Springs
(Ottawa, Canada)

Crazy glue could work. Of course it depends on the surface
area you have to work with and what forces the "tab" are
exposed to.