Yeah a pretty good bit. Mine only holds 20 gals so when it fills up you have
to turn it off and dump the water out.
Works good for me. I clean the bottom and mostly by that time it takes about
a 20 to 25 % of water out. So thats good. Just add in fresh water. Fish seem
to love it. I do it maybe every month n a half in the summer.
Priss

"LRobi31070" wrote in message
...
Does it suck out a lot of water in the process?