When initially installing our Tertra Debris Handling Underwater pump I thought it a good idea to surround it with stones larger than the pump plus a flat slab stone on top. My theory was this enclosure would shield the pump from excess debris. During this years spring cleaning the pump was pulled and I was shocked o see it was completely full of gunk. There were snails in every grid opening. To the DHP3600's credit it still provided good water transmission to the Tera Bio-Active flushable filter then back to the pond. After the pumps outer shell was removed and all areas cleaned it was placed in an open area so water circulates freely. Water circulation is more powerful than ever! This new position will also make cleaning a breeze. An important lesson.
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