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:

<span class="link_user">@WhiteEdge</span>, I did some further experimentation yesterday using a separate tank and discovered that it is much better to treat the source water with Grow Genius Mono Silica a full day in advance. I have now integrated a second tank into my setup specifically for this pre-mixing process. For this run, I let the source water sit with the silica overnight in the pre-mix tank and did not add my fertilizers until this morning. It appears that the standard 15-30 minute waiting period is not sufficient in this specific setup. By allowing it to stabilize overnight, the solution remained crystal clear after adding the nutrients. I also considered the possibility of a bacterial bloom caused by AminoXtrem, but since there are no signs of biofilm or similar residues, the extended stabilization time for the silica seems to be the definitive factor for maintaining stability in the HPA system.

<span class="link_user">@Bazooka_</span>, Well it worry me a bit that solution become milky , i always change reservoir when notice something like that. So i guess its not for me .... This is what i use now, diamond clear product, soft blue in color, PH is somewhat neutral i think, after adding to tank , PH stay unchanged . 0.5-1.0ml/10l