I had taken the picture after giving the medium a watering i was doing 2 waterings of 300 ml a day is that too much? since its canna coco pro with some perlite mixed i had read a few forums about a light watering 2 or 3 times a day
- Just re-read this - yes Definately too much! 600ml a day is for a 20-30 day plant!
Feeding multiple times per day with a drip feed will most likely give you better results than hand watering (like i do), but even at day 20, you probaly wont be drip feeding 600ml 3 times a day - that 600 ml will need to be split accross the 3 feedings (so 200ml per feeding)
The trick with drip feeding multiple times a day is "little and often" (or so the drippers say ^_^)
I'm a lazy grower so only want to water once a day at the most. I usually only water once a day from day 40ish (+) and even then i'm basing it on old soil technicques like the "wet and dry cycle" .... which effectiviely is waiting for the pot to become light
You dont want to let your coco completely dry out so it's not so much Wet and Dry ... more Wet and Mildy Damp.
How heavy should it be?! - If you let it completely dry it will be as light as if it were filled with polystyrene balls - you don't want it that light. Pick up your pot when fully watered (but this wont be until you water to run off) and gauge the weight - it's heavy, too heavy to lift with one hand. If your pot is as light a polystyrene - the leaves will almost certainly be droopy and limp - this means she's dying of thirst lol - Don't worry, she'll perk back up with a watering in a couple of hours!Ideally you want to be feeding it before the leave droop - but not constantly wet. When the pot drys our the roots go searching (again bigger root system, better uptake and better plant)
How should i water when it's mildy damp? I always water to run off - water slowly untll you see it slowly dripping out of the bottom of the pot - this will push the salts through that can cause lockout and keep the Root system/leaves/plant happy!
But don't drown the little seedlings

you need to build up to that large watering.
Have a read through Truus Coco Thread - he covers drip systems
https://www.autoflower.org/index.php?threads/what-truu-knows-about-coco.20249/
I don't know how to start a seedling with a drip system, so i'd go manually until you have a few sets of true leaves, and maybe set up a dripper from then!