Quote:
Originally Posted by mr.wilson
Potting soil adds nitrogen, something we have no shortage of in marine tanks 
A better medium for plants is latterite which is an iron rich clay. Sponges and some corals utilize iron, but that doesn't mean you should throw a handful of nails in your sump |
You could always run with this idea and us a nail gun to place your corals on a rock. This way they have iron right ready to go.
I probably shouldn't joke about it but it just stuck me as funny (but someone may start to wonder)
Joe