that wasn't based on weekly dose but if I were to dose that, I would have dosed 20ml per 50 gallon 3x a week (high tech setup) which is 60 ml total. but i see some problems with this:
Boron is not included, I assume they are relying on natural water which usually contain some Micros including Boron, but it is unknown how much Boron would be present in the natural water.
These Numbers are quite low, especially for the aquarium
Fe 0.0025
Mn 0.00125
Zn 0.000344
Cu 0.000344
Mo 0.0001
as you can see one of the potential reason why you were recommended what Darrel said in the post
#6