you're right about that. They do vary a little bit. But I use silica products for the silica. The 3% K doesnt bother me. . consider bloom boosters are like 0.50.30. Even if you use them in dilute form, you're getting a good deal of extra K It wont mix?? H&Gs aquaflakes part A is murky anyways, how do you know there's a problem?