Ya...I learned that with my Eheim 2213. Never over tighten the suction side hose connection. I cracked the thread on the inside and left it for about half a day. I noticed that there was some unusual splashing in my tank, meaning the water level went down. It must have spilled 3-4 gallons on the carpet. I had to re-order the whole housing for it. I now keep it in a 5 gallon bucked just for precaution.
