For those of you paying attention, you will recall I tried using Agent Green.
In the S650 I’ve been adding 10ml every day or so, and the phosphate as come down from 2.19 (yes!) to 0.36 today, so quiet a lot. And remember it may take a while longer to bring down because of phosphates leaching out of the rocks.
In the big house, they’ve come down from 0.2 to 0.11 today and I’ve not added to much as it wasn’t that high
I can confirm there has been no ill effects to either system, corals or fish. It just forms a smoke haze when you add it straight into the display and then clears over an hour or so.