Comment

Comment by David S. on February 28, 2010 at 2:17pm

I thought that the water for aquaponics was supposed to have a pH of 7. Is that a low enough pH such that copper dissolves too readily?

Comment by RupertofOZ on February 27, 2010 at 7:24pm

Yes and no Emma... A standard solar hot water heater has a bigger header tank that contains a copper heat exchanger to heat water to about 60c....

Too hot to send to the fish tank....and the copper would "ionise" in the acidic aquaponics water... and kill the fish...

It was purpose built from stainless steel... works on the same principles...

Works too well on a hot summer day... with the pump cycle I use.... so I cover it to reduce the heat buildup...

Comment by Emma Lysyk on February 27, 2010 at 9:34am

Is that a solar water heater?