Planted Tank Guru
Join Date: Jan 2010
Location: Contra Costa CA
Are you using KH2PO4 for P?
Dose the same amount (dry) of CSM+B.
Dose 25% of that of chelated Iron, unless you have a different recipe.
Do not combine the P with Fe products (Iron or CSM+B)
Dose whatever you like of CSM+B and Fe combo and test for Fe. Maintain about 1 ppm Fe.