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Future Harvest - Holland Secret HARD WATER Micro - IncrediGrow, Future Harvest Nutrients Nutrients

Future Harvest - Holland Secret HARD WATER Micro


Recommended for use with Hard Water over 200 ppm

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       Water quality is a big concern when growing hydroponically. To obtain optimum results, it is recommended to use water that contains as little salts as possible. Unfortunately, this is not an option for everyone and some are forced to grow using water with a high mineral content. In most cases, problems in water quality arise from higher rates of Calcium (although it’s advisable to do a water test to be certain), and using regular Holland Secret Micro will push Calcium levels too high which increase the chances of having a lockout with the Phosphorus contained in Holland Secret Grow and Bloom.

For those who do not want to spend money on a lab test, it is advisable to monitor water quality using a nutrient meter.  At levels between 200 and 300 PPM it is advisable to use Hard Water Micro, together with Calnesium to balance out Calcium levels.  Any tap water over 350 PPM should only use Hard Water Micro without Calnesium.


Holland Secret is a complete 3-Part Fertilizer with all of the essential elements and trace minerals that a plant needs. It can be used with any grow medium, (soil, coco or hydro) in any situation (cuttings, vegetative, flowering). 

Our product is always sediment and urea free and pH buffered for ease of use. With Holland Secret, additives are used only to  tweak and maximize performance. Best of all Holland Secret really works!

It is perfect for experts or novice growers as there is no need for individual fertilizers, because the three bottles, have a formula for all situations. Growers will experience no deficiencies when using Holland Secret alone.  Without additives, many fertilizers on the market are not quite complete and when used in isolation can be found lacking, creating plant deficiencies.

Key Features:

  • Automatically buffers pH to acceptable levels for plant growth.
  • 100% sediment free (ie. no precipitation of nutrient salts out of solution and becoming unavailable to plants).
  • Works well for novices and experts alike, because as well as being very easy to use. The three part formula gives precise control over feeding schedules.  
  • Extremely low salt index and only the finest raw materials used. Change the ratio between the three bottles to control nutrition for each specific stage of plant growth, as a professional grower would do. 
  • It can be used stand-alone without additives as a complete feed program. 


  Grow Micro Bloom
Seedlings & Cuttings 3 2  1
Mild All Purpose 7 5 3
Vegetative Growth 10 5 3
Beginning Bloom 6 6 10
Bloom & Ripen 1 7 20
*All measurements are in mL per 4L


VEGETATIVE w1 2ml/4L 13ml/4L
w2 3ml/4L 17ml/4L
w3 5ml/4L 19ml/4L
w4 5ml/4L 19ml/4L
FLOWERING w1 6ml/4L 6ml/4L
w2 7ml/4L 4ml/4L
w3 7ml/4L 4ml/4L
w4 8ml/4L 3ml/4L
w5 8ml/4L 3ml/4L
w6 8ml/4L 2ml/4L
w7 7ml/4L 1ml/4L
w8 6ml/4L -


*Extreme feeding schedules are designed for advanced gardeners only, and are designed to be used in conjunction with our full product line.

**Holland Secret Grow, Micro and Bloom are designed to be used in conjunction with one another, and never as stand alone nutrients.