Join Date: Mar 2011
Location: Oregon State Beavers!
EI Dosing and Potassium Deficiency??
So I know that pinholes are a result of potassium deficiency so I'm most certain this is the case. It starts as pinholes in the center of the leave and then progresses outward until the leave eventually falls off. The deterioration is occurring in old growth leaves. I already dose 1/4 tsp three times weekly of K2SO4 in addition to 1/2 tsp of KNO3 and 1/4 tsp of KH2PO4. The general guidelines for EI dosing don't even call for the additional K2SO4 unless their is an overabundance of K usage. Do I just need to go even higher with the K? Just want to get some confirmation before I start pumping out more. I also realized that the K2SO4 never dissolves all the way in the cup as there is still some crystals when it enters the water. Does that not eventually dissolve?
The tank is a 75 gallon, EI dosing, CO2, quad T5HO (single reflector) hanging 6 inches above the tank for 10 hour photo period.
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