My first indoor growing

This is my first indoor grow, please reply! any advice is useful!:

Equipment:

Secret Jardin Darkroom DR150
Ecotechnics Air-cooled Diamond reflector
Venture Sunmaster MH 600W
Philips Son-T Plus 600W
LightWave Digital Ballast 600W
GHE CocoPellets (10)
BioBizz All-mix 50L
BioBizz Bio Grow 1L
BioBizz Bio Bloom 1L
BioBizz Top Max 1
BioBizz Root Juice 250ml
E2 Economyline 240m3 100mm
A small normal fan
A Humidifier (works well enough)
A radiator for heating.

Plants (all are feminised): 5 Arjan's Ultra Haze # 1, 1 Church, 1 Arjan's Strawberry Haze, 1 Lemon Skunk, 1 Hawaiian Snow.

I keep them at 27-32 degrees Cecilius. Around 6-7 (less than 6,4) PH. Air humidity: 40-65%

It's been a month today since I've started growing and I think the plants are doing great. Nothing seems to be wrong with them except that some of leaves on the bottom of the plants are withering. but thats nothing I should be worried about right? I don't really know how much I'm supposed to water, and since this is my first time growing, any tips on growing or things I should do or know please do not hesitate to write! I want this grow to be excellent!

I will post pictures!

Today it has been 30 days. New pics.

On great White shark and one of the Arjan's Ultra Haze the leaves are some what mis-colored (maybe damaged?) if I could get some answer to why it is like that I would appreciate it! Does anyone know why the 2 small leaves towards the bottom of all my plants are just dying? is that natural? Am I doing something wrong?

I have four of the GW's going. a week in flowering and 2 of them are 3ft6in tall the one is 2ft with about 15 branches and one that is the size of these other ppls pics i seen. I dnt kno what goin on with the two ? any suggestions