Using chelated iron 13% w/w

[goldfish]

hi guys,,,Bunnings is selling some 500g chelated iron.
my anubias leaf r getting yellow, do any of you guys out there have any experience with dealing with irons?...the chelated iron says 13% w/w..what does that mean??
do u guys know how to dilute it...or how much to use per litre?
i dont want to kill my fish by experimenting.its too expensive!! :oops:

[duck]

The easy way is buy flourish iron that way you no need to worry.

[merman]

Check the one from bunnings as I am sure it has ammonia and nitrites in it, better off with flourish or fert tabs IMO