Quote:
Originally Posted by GGM
Isn't the reason why its bad letting the water get to warm is because it restricts the amount of oxygen that can dissolve in water, if so doesn't this only really apply to deep water culture? As NFT, aero.ponics and to some extent flood and drain part of the roots are never in the water anyway or roots are just getting splashed.
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Not exactly. Yes, as the water warms up it cant hold onto the oxygen molecules as well, but that is not the only bad effect. Unwanted micro organisms are triggered and begin to grow and multiply. The plants wont be able to process the
nutrients from the water they need. It also puts undo stress on the plants and they go into survival mode, dropping other functions like fruiting in hopes of just staying alive. Think of it like hiking on hot summers day in the desert, and being given all the water you want to drink. Only instead of cool water it's hot water. This applys to every type of
hydroponic system. Although, in an
aeroponics system it's a bigger problem. This is because the water is mixed more so with the air. The air temperature will dramatically affect how fast the water temp rises, and ultimately the temperature of the root zone.