I have a Mag 18 that's a little too powerful for my 90 gallon and thought about using it in a 32 gallon trash can I use to mix water for water changes. Anyone have a thought on this? Do you think that a mag 18 is a little too much for mixing water? Am I going to have a major whirlpool going on in the trash can? I'm currently using two maxijet 1200's that seems to be doing a decent job, but once in a while the brackets well loose suction and end up flying around in the trash can. I thought that maybe the mag 18 is heavy enough that it will just sit there and stay put. Any ideas????