The high efficiency turbine contained in this pump can handle solids up to a massive 12mm 12 in size. It is the only solids handling pump that we know of that can also run a fountain fountain set with 4 heads supplied.Fishmate pond pumps are held in high regard due to their reliabilty and performance. This ability to run with little problem or maintenance can be seen by the fact that the pumps are backed up by a three year manufacturers warranty.As always at pondkeeper should anything go wrong up to three years after you buy the pump we will supply you with a brand new one.