Question about CF readings and nutrients

adekiere

Active Member
Firstly, i'd like to say this is my first grow so please excuse my cluelessness.

I've gone the hydroponics route and I've opted for Dutchmaster Gold Range nutrients. I've got a 50L tank. So I've used the nutrient calculator on the Dutchmaster web site to work out the nutrients required. These results of which can be found here... http://www.dutchmaster.com.au/nutrient_calculator_result.php?Nutrient=Gold_Range_NUTRIENT&Gold_Range_ADD27=y&Gold_Range_SILICA=y&Gold_Range_ZONE=y&Grow_Weeks=3&Flower_Weeks=6&Meter_Type=CF&Custom_Conversion_Factor=&Tank_Size_Unit_Type=Litres&Tank_Size=50&STANDARD=y


The water I'm starting with gives me a CF reading of between 4-6. My understanding is that, because the nutrients directions are based on water with a CF of 0, my target CF needs to be increased by about 5. The nutrient calculator gave me a target CF of 8 so that means my target CF should be around 13.

Now after adding the nutrients in the quantities specified by the nutrient calculator I'm getting a CF reading of 32. I'm a bit confused why the CF is 3x higher than it should be given I used the correct amount of nutrients. Can somebody please tell me if this is normal? Or am I doing something silly? Also am I correct in thinking that now I need to add water until my CF reading goes down to 13?

Thanks in advance for your help.
 
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