Reverse Osmosis Stability?

Drift happens because there's less 'stuff' dissolved. At lower molar concentrations, the less things have to change to cause a major shift in pH. buy better fertilizer. Good soilless/hydro fertilizer will be stable, like jack's nutrients. Drift happens from poorly buffered fertilizer products (or unbuffered altogether). Ther's no reason to keep a res of water that isn't pre-mixed with fertilizer. In that case, just fill it up as needed instead of letting it stagnate. i don't think the typical ranges of ro and hard water is enough to significantly impact co2 absorption. the water is nowhere near holding capacity. Also, gasses dissolve incredibly fast so it'll reach equilibrium with atmosphere very fast. After that point it should not be the cause of any drift seen, though drift can still happen. if this is the cause... fill up rez and wait 5 minutes before testing ph... did it move? if not probably not the cause. Whether you have bubbles or a powerhead, that should be running, too. Is the reservoir stagnant? (rhetorical) ... take some of your rez water, after it drifts, and make a soil slurry to test ph... does it re-balance out? if that's the case the balance will be taken care of once it is in the medium. if little to nothing is dissolved into it (~0 ppm to start), then it really can't do much to your medium's balance. The molarity is too low by comparison to cause any change in that case. the weighted average effect will be insignificant.

More "pure" water is the more it will absorb CO2 from the air. The reason is that pure water has a higher capacity to dissolve gases, and when CO2 dissolves, it reacts with water to form carbonic acid, making the water more acidic. This means there's more space and fewer competing molecules for CO2 to dissolve into. Processes like reverse osmosis and distillation produce very pure water, which readily absorbs CO2 from the air. Causing spikes.

RO is aggressive, and if its in a metal bucket that could be throwing it off. Glass or plastic only. should not need any PH down. mix all your stuff and let it sit then PH test it. adjust from there but know it might need more sitting time. Good nutrients are buffered. cheep ones are not. RO water should not be cuaseing massive swings their is nothing in it to do that. But don't measure RO waters PH with probes the RO water will damage the tip. Only when other things have been disolved into the water.

Osmosewasser am besten am Tag vorher mit Calzium und Magnesium versetzen. Strömungspumpe über 24h laufen lassen und dann erst Dünger dazu. 2h warten während die Strömungspumpe weiterläuft. Dann erst pH einstellen und nach weiteren 2h kontrollieren. Der einzige mir bekannte Weg, keine Probleme mit Osmosewasser zu haben ist, kein Osmosewasser zu benutzen. Warum nimmst du das? Sind deine Wasserwerte so schlecht? Dann verdünne dein Leitungswasser lieber mit einem kleinen bisschen Osmosewasser. Das spart viel Energie, Wasser, Geld und du hast wesentlich weniger Aufwand.