>From: "T. Misiak" <misiak at fsu_fsufay.edu> >Date: Sat, 23 Sep 1995 20:13:37 -0400 (EDT) >Subject: iron concentration > > What is the "optimum" iron concentration for good plant growth >that is still safe for all the aquarium fish? TIA. > Tom 0.3 ppm iron as Fe is safe for all fish and plants as far as I know. -- Regards, Dave