Distilled water is always recommended; the water should be completely removed and cleaned about once every three months. The units (72 and larger) have a filtration system to keep the water free of debris. The units need to be topped off with water as to keep the pump completely submersed.

Maintenance of Pumps and Filters The filters are re-usable; they can be rinsed out and replaced in the unit. The pumps have a one year warranty and do burn out occasionally. This is primarily due to the pump being run without proper water levels, causing it to burn out the motor. Bluworld does sell replacement pumps for the units. Bluworld pumps are specially manufactured as to insure that the noise level of the pump does not interfere with sound of falling water.