watering question

i've had some issues with my plants and just to make sure i'm on the right track i'd like to ask your opinion on how much water should i give my plants and how often? i don't have an automatic system or dripping system yet. what are your experiences? i'm growing in 12,5L pots and using coco medium.

thanks!

depends on set up, temps, humidty, pot sizes. Mine are in small pots, with 600w system with temps around 25C and i water once every 2 days. As a rule of thumb water when the top layer has gone crispy and soil is dry about an inch under the soil