1.You can get sands cleared, dirty drained, water exchanged without any letup.
2.To change water and needn¡¦t pump sand, special oil envelop but can't make gas leak, the processing of exchange water could not be accidentally dropped.
3.It couldn't moisten your hands when wash sands and drain dirty in winter.
It has large types of the Sand Washer which designs for fish farm to exchange water, improve efficiency.