phytoplankton water type

[dalilgriffith]

which one?

 

[billsreef]

Depends

In someplaces tap water is fine. However, if your tap has problems with contaminants other than just nutrients, than you need to treat it somehow.

 

[dalilgriffith]

Can i use ro water or does it remove the nutrients i need?

 

[billsreef]

You can use RO, after all your adding nutrients anyway.