Coco going loco

When phosphorus and calcium become unavailable, key energy-dependent processes—specifically the conversion of light into chemical energy and the subsequent manufacturing of sugars—are severely hindered. calcium is highly susceptible to leaching. (P) is widely considered the most critical nutrient for early plant development. (P) is unique among macronutrients because its availability and mobility are heavily governed by soil pH, which dictates which specific elements it binds with, rendering it insoluble and inaccessible to plants. In acidic conditions, phosphorus is highly prone to binding with iron (Fe) and aluminum (Al). Don't want ammonical over 20% of total nitrogen or bad things happen. Complicated butt, something like, the higher the concentration of ammoniacal nitrogen relative to nitrate, the greater the lowering effect on pH. Why when you flush it exacerbates. Gluck.

So long as there is adequate oxygen in the medium and air and water moves at a decent interval, its practically impossible for the pH to skew in a soil that is taking in oxygen and releasing CO2 and nitrogen, I say practically, but meh, even with plenty of oxygen, the process of converting ammonium NH4+ to nitrate NO3- (organic)by bacteria releases hydrogen ions H+, which directly causes acidification (lowering pH). While water movement is necessary, consistent water moving through the soil can leach away basic cations Ca2+, Mg2+, K+, Na+, leaving behind acidic hydrogen and aluminum ions, causing pH to drop, especially in humid conditions. High levels of CO2 in the soil (from intense respiration) dissolve in soil water to create carbonic acid, H2CO3, which lowers the pH. Using same medium repeatedly will cause problems unless the co2 is oxidized. When cells lack sufficient oxygen to carry out aerobic respiration, they switch to anaerobic fermentation (specifically lactic acid fermentation), which results in the production and release of lactic acid, skews ph acidic. Either there is not enough oxygen in medium, rh is too high for too long. Nitrogen conversion is fooked and stuck due to ph skew. No pictures but very easy to happen to a medium come flower time, biological mechanisms strongly support that microbial activity and oxygen demand increase significantly during the flowering/fruiting phase due to higher root exudation. More exudation, more co2, more moisture retention, more oxygen scavenging. Microorganisms are in direct competition with plant for O2. Oxygen moves 320,000 times slower in saturated medium. Even if it's there it becomes locked out. Regular flush is pointless if its a ammoniacal nitrogen problem. Even if you flush the ammoniacal remains, quickly starts to breakdown NH4+ to nitrate NO3- skewing ratio again, and ph with it. Takes 4 or 5 times more water to separate ammo nitrogen from soil particles than nitrogen does to remove nitrates.