Guess I just can't get enough. The last 4 200g buckets of IO has been fairly consistent for me, cloudy with some undissolved particulate, as normal with IO. I find that I also have to bump up the CA, & MG a little each time. I want to test IO for Phosphates, I'm thinking it has more than to 0 they claim on the bucket. Switching salts has been disastrous for me but It is getting to the point that I want to try either one of two salts available locally, Tropic Marian or the New Oceanic. Has anyone personally tested either one of these for phosphates?