white subtance in water,..

MI5

Member
hey

i have a DWC hydro, i lifted up one of the net pots and found a white substance at bottom of the cup which is usually submerged in water.. all the cups have this. is it the nutrients solution reacting with something? i have an air pump pumping air to an airstone inside the DWC... maybe its the oxygen bubbles popping when it hits the top of the water.. not sure..

some of the water was dripped on to the lid. after around 10 minutes, maybe due to the heat of the light, the drop of water turned into pure white power.

is this white substance a problem?
 
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