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For this grow I'll be using coco coir for the first time with Terra Aquatica tripart + TA calmag + TA Silicate and TA pro roots.
The coco I'll be using comes as a brick (5kg - 70L). To prepare the coco I watered half of the block to let it expand, then it was all rinsed with tap water (~0.4EC) thru a kitchen pasta rinser. Then I placed the coco in 4 diferent 3 gal fabric pots used in the last grow. This 3 gal pots were then placed inside a 60L plastic box in order to buffer the coco.
The coco was buffered with a solution of 2ml of TA CalMag per liter of water. It took ~18L of solution to fill the box.
The first period of buffering took 16 hours. After the 16h of buffering I refilled the box with a fresh solution, same as before, that stayed for another 26 hours. In total the coco was submerged for 42 hours in the CalMag solution in order to buffer.
07/06/2024 - The 3 white widow seeds were placed in a glass of bottled water until they sunk to the bottom.
After ~5 hours in the glass of water the seeds sunk and I tranfered them to a wet paper towel inside a plastic bag in a dark place (T ~20 ºC)
10/06/2024 - All the seeds popped open, tho 1 was faster than the others. Transfered the seeds to the small pot with coco/pertile (70/30) with a DIY humidity dome. Watered with a solution of bottled water + calmag + pro roots (2 drops per Liter).
14/06/2024 - Only one seed emerged from the medium, the faster one.
@trazom85, hello, it was a 3.8L until the end of week 5, then I transplanted to a 3 gallon (~11 liter) that lasted until the end of the grow. You don't really need bigger pots when using a drain to waste hydroponic system, the only advantage you can get is fertigating less often.