Help - DIY Fertilizer

[cichlids]

Hello,
Few days back got the following chemicals to prepare a DIY macro fertilizer,
KH2PO4, K2SO4 and KNO3.
My tank dimensions are - 24*15*18 (l*b*h)
Plants : HC, Staurogyne Repens, Uticularia Graminifolia, H.Tripartita, Blyxa, Needle Leaf java ferns.

Are these chemicals sufficient or should I purchase some other?
I'm a newbie in preparing DIY ferts.
In order to prepare a solution, how much quantity of chemicals should be added to water?

Please help!!
Have burnt my pocket many times purchasing branded ferts.

Thanks,
Nandan

[SCORPIO]

All of the above mentioned chemicals (KH2PO4, K2SO4 and KNO3) are Macro nutrients. You also need Micro nutrient. CSM B is best known resource of Micro nutrient. But this product in not available in India. So you have to source it from USA. Here is the link http://www.aquariumfertilizer.com/index ... 2&Regit=11

Here is an online calculator http://www.theplantedtank.co.uk/calculator.htm

[cichlids]

Thank you very very much Rajiv.. Thats a very useful link..