The worry I think is more on the GF choking on the gravel (I've only seen it
happen once, and the GF had this pebble stuck in its mouth for several
weeks, but was otherwise fine), hence anything that is smaller than the GF's
mouth should be fine. Mine seems happy with 2-3mm gravel.

Cheers,
Poe

"Underwater" wrote in message
...

I have pea gravel in the tank. The fish are getting bigger now and I've
read a lot of warnings here about the fish swallowing gravel.