good read! great write up! thanks for putting the time into this!
I also have experienced elevated levels of AI after utilizing MP.
I don't have any soft corals in my tank, just lps/sps (well i guess i have a small colony of ricordia).
I also have seen no adverse effects to any of my corals.
My first triton test was performed in sept 2015.
Al was tested at 0.00
I just received my latest test back yesterday (june 2016).
Al was tested at 52.58
In late Feb early March i introduced a single 8x4x4 MP block into my sump (100g total system). This is the only thing that i can attribute to the rise.
I also do a 1% daily water change, skim heavily, GFO (changed monthly), ROX carbon (changed monthly) and dose MB7 daily (x4 drops).
I will say i am a big fan of the product so far, until i see reason not to be, guess time will tell.
I will be very interested to see where my Al level is upon my next test, which i was planning on doing in 6 months. I may push that to 3 months now just to see.
sorry all i have is a phone FTS pic at the moment as I'm traveling.
