pH & hardness

Plant-a-lot Straight Grow and Bloom is formulated for medium hardness water of (EC of 0.4-0.6) and the recommended dosages give the perfect pH value.

However, if RO water is used, then the solution will have a lower pH, and should be adjusted accordingly.

And if the water has a higher initial EC value, the solution will also have a higher than perfect pH.

Working with concentrate

To reach the perfect pH value with RO or very hard water, or to use Plant-a-lot Straight Grow and Bloom with an automated dosing system, the grower can prepare a concentrate which can be further diluted.

For the concentrate, dissolve 40g in approximately 1 litre of hot water.

The pH of this concentrate should be about 2.75-3.

For RO water the pH of this concentrate should be brought to pH 5.75-6.0 by adding pH-up.

Now the concentrate is strongly buffered, and can be used with RO water, or just to increase the EC of the working solution while keeping pH-perfect values.

If this concentrate is to be stored for longer periods, it should be in sealed containers.