[greenguppy]

I know nothing about dry ferts, it seems quite complicated? I was looking at nilocg's dry ferts, and there are 5 different packages? whats ei? csm+b?

 

[Plinkploop]

Mixing dry aquarium fertilisers

What are dry fertilisers? Dry aquarium fertilizers refers to fertilizers that come as pure chemical salts. These salts dissolve in water to provide the necessary nutrients to plants. They are extremely concentrated as they come in pure chemical salt format. Most commercial fertilizers are made...

www.2hraquarist.com

Good read, it's a starting place.