First Grow Tangerine Auto SP 250

We got our hands on some calmag hoping it will solve the problem with the spots. Also, we noticed the leaves started curling up and think it is because of over-watering so from now on we will wait until the top inch of the soil becomes dry before watering again. We were watering daily (40-60 ml) even though the top soil wasn't dry which we think caused some of the problems.. Hope changing this will help her recover. Also, we raised the ph to 6.2 as we read that the calcium is best absorbed from 6.2 upwards. UPDATE (16/11): The problem with over-watering turned out to be true as minor spots with algae appeared over the coco, now we water every 2 days, maybe more for the plants closer to the humidifier. We did some more research and found out is not a good idea to let coco to dry out completely, especially an inch.. we will try to water when the color changes from dark to brownish. Also, we think we found out what was the problem from the stains and the curling of the leafs.. it was because of WIND BURN so we turned the ventilator to not blow directly on the leaves. We will see in the following days if our hunches turn out to be true. UPDATE(19/11): The leafs are a kind of droppy and we think it is because of over-water again...can't seem to find the right schedule..it's so hard to be a beginner. Also, we added the second light in the tent and now the temperatures raised to 28-30 degrees... probably also because we lowered the light to 45 cm as well.