Shaggy's Grow Caps Grow

I have chosen the five Jacky White clones/seedlings (seeds originally by Paradise Seeds). Some of the clones are the top of the pruned branch, some are the bottom of the pruned branch and thus effectively have already been topped. They're between 8-12cm at the end of week 4. They were started off in 1 l pots, and are now into 11 l pots with 10 l of media mixed with a sachet of Grow Caps. My light schedule (duration, light type; distance, etc) cannot be reflected above as they're sometimes on the window sill enjoying the sun, or in the HPS tent when the sun is not out/ at night. The media is Canna Coco Pro Plus (40%); Tropic Bat Mix (30%), and Perlite (30%). Grow Caps site says 2g/l of Grow Caps is required, so if the sachets are for 11l pots, mine have 2.2g/l as it was mixed with 10l of media. I'll be watering with aired tap water only. 11l pots weight 3.1kg when plants just transplanted into them, with no watering. This is the base weight and the plants will not be watered until they get below this weight. Dry weight will be about 2.50-2.75kg, which is when I look to water.