those flower nursery or ace hardware shop. 3 packs of sheep organic rm5.9. 2 packs of chicken organic rm4.9. NPK one is the same..rm4.9.

you can throw the whole pack in. But NPK...i just put 1 tea spoon in 2ft tank.

after you thrown everything in. cover with a layer of gravel will do.

i got some iron...how many gram u want?