This is very interesting. Has the same experiment been done with soft corals?Here's how I did the iodine/macroalgae study I mentioned to see how one might do something similar:
https://reefs.com/magazine/chemistr...in-reef-tanks-2-effects-on-macroalgae-growth/
and here's how I tested the impact of aluminum on corals at different aluminum concentrations:
https://reefs.com/magazine/chemistry-and-the-aquarium-aluminum-in-the-reef-aquarium/
Also how did you test aluminum levels in the second experiment? This gave me the idea of looking at the affects of microplastics on coral growth, but I don't know of a way of measuring the microplastic concentration
