CANNA SUBSTRA
CANNA SUBSTRA is a professional, fast working nutrient for cultivating plants on inert substrates (rockwool, sand, clay pebbles) in which the drainage water is not returned to the nutrient tank but drains away.
CANNA SUBSTRA products
Why use CANNA SUBSTRA?
CANNA SUBSTRA is the best nutrition for growing on inert substrates such as rock wool. It is used especially on ‘run-to-waste’ systems; these are systems where the drain water is drained off or so called open-hydroponics systems.
- With CANNA SUBSTRA you can grow with precision.
- There are no damaging residual elements in SUBSTRA nutrition.
- CANNA SUBSTRA comes in a hard and soft water version.
Product line FAQ
I'm using a re-circulating system. Should I use SUBSTRA or AQUA?
Both nutrients are developed for inert media such as rockwool, clay pebbles and many others. CANNA specially developed CANNA AQUA to work in recirculating systems with these inert media. CANNA SUBSTRA should be used when using a run-to-waste system in inert media.
Soak rock wool before use
Never use raw rockwool! The pH is too high. Always soak rockwool before using it for the 1st time. Soak with water or a nutrient mixture with the pH adjusted to 5.5 and an EC of about 1.3 mS/cm.
Keep your nutrients dark
Light breaks down iron chelates! Because of this, it is very important to ensure that no Ultra Violet light reaches the nutrient solution. Light also causes algae to grow in the nutrient solution, which can lead to blockages. Furthermore, algae can take up nutrient elements and cause nutrient deficiencies to occur.
Keep slabs horizontal
Make sure rockwool slabs are horizontal. If they are not truly horizontal the moisture will run to one end of the slab. This could mean that some plants become too dry and others too wet.
Amounts of nutrients
Keep a record of the amounts of nutrients and additives you add to each tank of nutrients you mix. You then have a good starting point for the next time!
Measuring EC/ppm
Don’t just measure the EC/ppm of the feed water and the drainage water regularly, remember to measure the EC/ppm of the substrate too.
Adjusting your nutrient tank
Take your time diluting and adjusting your nutrient tank! This is essential for the growth, flowering and development of the plants and will yield the best results.
Mixing nutrients
Check and adjust the nutrient reservoir as follows: Take a reading of the EC/ppm and pH of the nutrient solution and then determine whether there needs to be adjustments. Use the EC/ppm reading to determine if your concentration needs to be higher or lower, based on the values shown in our grow guide. Use the pH value to determine if an adjustment is needed and if so, try to correct the pH value at the first attempt!
CANNAZYM and grow mediums
CANNAZYM extends the life-span of Clay Pebbles, coco, and other growing mediums because it breaks down dead roots. It can be used to re-use coco medium.
