Hello. I am having a serious problem with my Eheim Classic 600 (2217). When we have a power outage (power goes off and comes right back on within a second) the filter pops the top off and water goes everywhere!!! Thank goodness we have been here when it happened otherwise it would have been a much bigger mess with dead fish!! Can anyone tell me why this is happening? I have been running only this filter since March of this year in my 75 gallon. I used to run it and an Eheim Classic 350 (2215) in the same tank for over 3 years with no problems, but at our previous house a few years ago before we moved. Never had this problem on either filter before we moved!! They seem to run great, except for this. HELP me avoid a messy flood! Thank you in advance!