Fertilizing macro tanks

[fishman1218]

I am starting a macro only tank and was wondering how often I should fertilize ? I also picked up some iron EDTA, potassium nitrate and calcium chloride from aquatic fertilizer. Macros will be various caulerpas, red gracillaria, and possibly red mangroves.

[Plantbrain]

DTPA Fe is better suited.
General 2-3x a week is good, some sub divide into daily.
Consumption varies dependign on species and light intensity, more light= more growth= more uptake= harder to manage for most folks.

Also, Ca and alk levels can get depleted rapidly.
You will also need KH2PO4.

Regards,
Tom Barr