Dry dude...
What I'd do is sit the pot in a bowl of water (or a bucket or something) with a bit of water at the bottom of the pot. This way the bottom of the pot is now wet and the tap root of the plant will start to seek that wetness out.
The faster the tap root hits the bottom of the pot the better.
Secondly you want to keep the soil a touch moist. So I would also water lightly from the top.
Thirdly coco and perlite (while a great substrate) has no nutrients at all. Personally I would just use tap water for the first 4-5 days. After that I'd start feeding very lightly, increasing the amount of nutrients by the tinest amounts each feeding.
Think of it like body building. Each time you go to the gym you need to be lifting more weight than the last time, or else you are not growing. With plants it's kinda similar. Adding a little bit of nutrients each time increases pressure around the root zone forcing more food up into the plant.
In my opinion the plants are under watered and underfed.
With growing if everything is 100% the plants will grow 100%. If everything is 100% but one thing is only 20% the plants will grow only 20% of the speed. Right now your nutrients are probably like 5-10% (only getting whatever tiny amount of nutrients are in the water and coco) so you need to give them some food now and next time add an extra few drops of nutrients per litre. So depending on your nutrients you may start off with 0.5ml per litre their first feeding. Then 0.75ml per litre. Than by week two 1ml per litre, then up to 1.25ml per litre, then by week three 1.5 ml per litre and so on and so on.
Not sure what nutrients brand you are using - so please check their advised feeding schedule, my example above is purely an for illustrating the theory and not a real schedule
Hope that helps bro
Coco and perlite is a bit of a b!tch to work with in the very beginning but stick with it and it WILL reward you.
Finally make sure and use Coco specific nutrients if possible!
Good luck and feel free to PM me if you need.
EDIT : Also can you put up some pics of your grow space for me - thanks
SECOND EDIT : I just realised that I realised half way through writing this post you are growing in coco not soil, so ignore the fact I used the word 'soil' I assumed soil at first. Also this means that coco is like a wick or a sponge. If you water it, the water spreads through the whole coco. Generally with dirt you need to carefully slowly water it so not to make any dry pockets. Where as coco is less likely to create dry pockets.
Also with coco you NEED to KEEP it moist all the time. Especially once you start feeding it, otherwise the nutrients have a tendancy to dry out and create salts which you don't want. Keep coco moist, make sure to mix a good bit of perlite in it and water lightly but regularly, like lightly twice a day.
