I should point that I only have GSA on those leafs and a very tiny amount on the anubas. Everywhere else is clean, including the glass. In fact I can't remember the last time i cleaned the glass!Possibly, easy way to find out is add an extra teaspoon to your macro bottle and wait a couple of weeks
I have the lights on a dimmer so only run them at 50% of the maximum power. I have no idea what that translates to for PAR though.Light is too much in my opinion ,but if you run it at 50 % i have no idea what that is meaning.
Also just had a quick look at your journal, imo distribution of flow may possibly be your issue, the flow at the front of the tank (blyxa) may be too fierce not allowing enough contact between plant and co2 nutrients etc then the flow will be disrupted by the hardscape imho causing issues for the plants on and behind the hardscape, have you tried just the inflow/ outflow pipe in one corner to create a circular flow around the tank ?
I would like to throw in a hypothesis, your PO4 is precipitated by iron, rendering both nutrients unavailable.
The affected leaves on your ludwigia look to be below the place you last trimmed them, you could uproot and replant the new stems or trim off those leaves,
Or are you saying the remaining PO4 from the previous day is causing the Iron to become unavailable? I also thought it was only Iron affected by PO4 and not both?
Iron is very attractive.
I would try changing micros to a branded one, such as Tropica's. Just to test. Then if it works but the cost is prohibitive, I would try to find alternatives later.
Happens with my stems, I think the plant puts its energy into the new growth which leads to the old leaves deteriorating and becoming susceptible to algae, I hide my cuts behind other plants and hardscape.That is what I have been doing although I was expecting everything below the cut to remain healthy so i could achieve a bushy appearance. Is that normal behaviour?
I have started adding Easy Life Ferro to supplement iron as well so I can at least rule that out.
It looks like I should change my EI recipe as well then.