A pump where you control the flow. From 4396lph to 9200lph.
Using the weatherproof electronic controller it allows you to change the flow rate up or down.
This has a number of benefits:
Pump can be run 'low' in winter - ticking over at just 15 watts.
Adds an extra degree of excitement to watercourses and waterfalls.
Flow can be increased in the summer - bringing additional oxygen to your fish when they need it.