Hi Tom,

Based on EI, your comment helps understand why only dosing on RR is not getting me there. The rule that plant growth is limited by the less available nutrient, is quit common over here. But not that excess availability of all nutrients does not stimulate algae growth.

I will drop by old behaviour of measuring and dosing (otherwise I'm still not getting there) and follow the work over here. Simply because the new dosing scedule used for a week shows already new growth.

Still not sure how to dose Fe (but Fe dry fertiliser is ordered from Greg's shop, so math will do the trick hopefully) and what target level SO4 should be. I will turn this forum upside down to find it.

Thanks for your comments,


Koen.