Bazooka_

<span class="link_user">@Green_claws</span>, Hi Green_claws, Thanks for the feedback! I want to make sure I’ve got the chemistry right based on your comment. My grow room is currently supplemented with CO2 at around 1200–1500 ppm. My air pump is pulling this CO2-rich air and bubbling it directly through the reservoir. Are you saying that this high CO2 concentration reacts with the dissolved calcium (from the Metrop Calgreen) to form calcium carbonate precipitates (CaCO3), which is causing that milky appearance? So the bubbler is essentially acting as a catalyst for this reaction by forcing the CO2 into the solution? Thanks again for the help!

<span class="link_user">@WhiteEdge</span>, I’ve been monitoring this without Silicon (Grow Genius) lately: the solution still turns milky after 24 hours. This clearly proves that it has absolutely nothing to do with the Silicon. My pH levels never exceeded 6.1, and I consistently adjust the pH to between 5.8 and 6 before even adding the fertilizer. The only thing in the tank is the bubbler. I’m starting to suspect the Metrop products themselves—perhaps an expired batch of AminoXtrem or something similar. Technically, all Metrop products should be fully compatible with each other. It’s a standard reservoir setup where you mix the solution and then use it—none of my batches were in use for more than 7 days. Plus, since I’m running Drain-to-Waste, there is no runoff returning to the tank that could trigger chemical reactions. Furthermore, I saw a video from Grow Genius and Autopot where they mentioned that you can even mix the Silicon in last. It actually contains a wetting agent because it was originally developed primarily for foliar feeding. So, the cloudiness is definitely not caused by the Silicon.

<span class="link_user">@WhiteEdge</span>, I have to row back a bit on my last update. Unfortunately, even with the overnight stabilization, the solution turned milky again by the morning. The pH drifted up to 6.3 overnight, and the typical &quot;silica fallout&quot; occurred. I’m still not 100% sure about the root cause yet. I’m currently looking at two main theories: • The Bubbler/Oxidation: The aeration I used to outgas the $CO_{2}$ might be driving the pH up, or perhaps the oxidation is interfering with the silica&#039;s stability once the Metrop MR 2 is added. • pH Management: It seems a pH of 6.3 is already past the &quot;point of no return&quot; for this specific concentration. For the next batch, I’ll try to be much more aggressive in keeping the pH down (targeting 5.2–5.5 initially) to see if I can catch that drift before it clouds up. In an HPA Aeroponic System, I can&#039;t afford any precipitates in the lines—though I must say, I haven&#039;t had any issues with clogged nozzles so far—so the search for the perfect mixing protocol continues!

<span class="link_user">@Cannabeast40</span>, thx

<span class="link_user">@Bazooka_</span>, Great news bro, glad to hear that. A bit more job dissolving it, but final results are counting:+1: