I added a 1/4 turn valve in the 1/2" line that I T'd off the return to control the flow, purchased here:
http://www.duralirrigation.com.au/product/Low-Pressure-Quick-Action-Valves.html
Free shipping Aus wide, and HEAPS of good stuff for tank plumbing. My tank journal has a photo of my reactor etc.
http://www.duralirrigation.com.au/product/Low-Pressure-Quick-Action-Valves.html
Free shipping Aus wide, and HEAPS of good stuff for tank plumbing. My tank journal has a photo of my reactor etc.