Whats the deal with my babies

So i have been trying really hard to get these clones going( two GDP clones) and they continously have curling leave tips and i cant figre out why. Any ideas anyone

how often do you water it you may be watering it to often but it also looks like nitrogen deficiencies.

Nitrogen Deficiencies:
Plants will exhibit lack of vigor, slow growth and will be weak and stunted. Quality and yield will be significantly reduced. Older leaves become yellow (chlorotic) from lack of chlorophyll. Deficient plants will exhibit uniform light green to yellow on older leaves, these leaves may die and drop. Leaf margins will not curled up noticeably. Chlorosis will eventually spread throughout the plant. Stems, petioles and lower leaf surfaces may turn purple.

i have been giving it cal-mag at 1/3 strength since they are so young and have the water running continously when the lights are on, but only slightly running

SO you cut the clones and dipped them in rooting hormone powder is better then gels.Then you put them in a humidity dome til the roots showed then put them in your setup right..No nutes til week one in the actual grow setup.Should only mist til roots pop from rockwool cubes

also did you keep your ph aroun 5.5 for the water

yah and the roots are out i have the PH around 5.9 right now do you think i should just start over or what