Sponge filter lift tube question

Tom Randy wrote:
Hello all,
I have a question about sponge filters. Does the lift tube need to
be completely under water or is it alright for the top of the tube
to be above water in air? This may sound like a stupid question but
after googleing I haven't found an answer yet. I just set up and
started cycling a 10 gal. tank for freshwater fish but I'm starting
a 2.5 gal tank to have a little fun growing those Triops shrimp.

IF the tube has to be completely underwater is it alright to cut the
lift tube down to fit?

Yes, it must be under water or it won't circulate the water, and it is okay
to cut it to fit.

Cindy