Chuchin grow 2/ Watermelon zkittlez

Hi there Pedro, this is for sure bugs, you can see this from the shape of the marks, how they are like "sharp" something like bite marks. This can happen from any soil you buy in a store. Even if you buy it in a store and the package is fine , sometimes some kinds of eggs are there. So next time what you can do is take the soil and "air it out" in the sun for some hours, this will activate the eggs and the bugs will be born and fly away, before you use it on the plants. Another thing i can see from the picture is some overwatering . This is logical, plus bugs love the soil when there is too much water or humidity. Make sure you have good drainage holes and maybe dont water so often, leave it like 12 more hours than usual. If you follow a strict wet-dry cycle you will see the plant will grow faster. I hope this helps ! 🚀