I have recently started dosing 40% sodium silicate as part of an ongoing effort against Amphidinium and Ostreopsis dinoflagellates in my tank. I've read as much as I can on this subject and it seems that maintaining a silicate level of 1-2 ppm is a reasonable target range. I bought a Hanna silica checker, which has an upper detection limit of 2 ppm (as SiO2). I started with the dose in Miami Reef's dosing chart and it got me to the middle of that range, but it was below 1 ppm the next day and completely depleted back to the baseline level (~0.2 ppm) in 2 days. So it appears I need to dose it daily or every other day to keep it in that range. Does that sound right? Thank you!
